grumpybrit

FYI my oath is on Friday!

Oh then expect 6-8 weeks from approval to oath

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

I got it yesterday too, using Chrome on my laptop.
Had to force a reboot to get rid.

The flu shot is not required. Your doctor will have reviewed all your vaccination history, issued what you needed to make up any gaps, and then signed that you are all good. USCIS do not really check what's in your medical, just that you have had it done by an approved doctor and that it is current (no more than 1 year old).

How anyone knows or whether anyone would find out is irrelevant. It's against the rules. People get away with robbing banks. Doesn't mean we should all try it. 

ESTA and a Visa are completely different things, you can most definitely leave on one and enter soon after with the other (I did the same with my L1-B).
However...
Never lie or omit the truth when talking to any immigration official... Ever!
Always be honest and you will be fine.

Do not propose just to immigrate!
That is the very thing USCIS are there to prevent and they will figure you out. That being said if you love them and were going to propose anyway then go ahead and do it, but remember that you will need a lot of evidence to prove your relationship is legitimate.
Honestly, I think your best bet is to wait a while, see if it works out long distance with your relationship and focus on your life where you are for now.

Do not propose just to immigrate!
That is the very thing USCIS are there to prevent and they will figure you out. That being said if you love them and were going to propose anyway then go ahead and do it, but remember that you will need a lot of evidence to prove your relationship is legitimate.
Honestly, I think your best bet is to wait a while, see if it works out long distance with your relationship and focus on your life where you are for now.

Do not propose just to immigrate!
That is the very thing USCIS are there to prevent and they will figure you out. That being said if you love them and were going to propose anyway then go ahead and do it, but remember that you will need a lot of evidence to prove your relationship is legitimate.
Honestly, I think your best bet is to wait a while, see if it works out long distance with your relationship and focus on your life where you are for now.

I wonder if they thought her "buy and sell goods" business was a little too vague.

You can do it instantly online and it does not impact processing times at all, but if you move state you will be assigned to a different field office and they may not be as quick as your current one, or they may be quicker!

Always ensure USCIS has your most current address. Address discrepancies can be a major red flag,

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

Interestingly I was reading of someone else the other day that had issues after getting angry with a USCIS representative. Perhaps this has more of an impact than it really should. For my part, I suggest smiling and jumping like a trained seal until you get the piece of paper, that is what I fully intend to do. That piece of paper is not a right, it is a privilege that is earnt.

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

Interestingly I was reading of someone else the other day that had issues after getting angry with a USCIS representative. Perhaps this has more of an impact than it really should. For my part, I suggest smiling and jumping like a trained seal until you get the piece of paper, that is what I fully intend to do. That piece of paper is not a right, it is a privilege that is earnt.

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

No,
They can absolutely say that they think the marriage is not real. They do not need concrete proof, the burden of proof lies on you, not them. Remember at all times that you are the one asking for the privilege of moving to the USA and that you are the one who needs to prove things to them, not the other way around.
Also, I really do not think this is about the stokes interview questions, there was something not adding up before then to cause them to arrange a second interview and I would bet on it being a combination of you overstaying and his previous marriage.

Interestingly I was reading of someone else the other day that had issues after getting angry with a USCIS representative. Perhaps this has more of an impact than it really should. For my part, I suggest smiling and jumping like a trained seal until you get the piece of paper, that is what I fully intend to do. That piece of paper is not a right, it is a privilege that is earnt.

At a guess, I am thinking that his previous marriage, your time out of status and the dropped questions at the stokes are all adding up to an alarm bell for the case officer. Best of luck getting it all resolved, make sure you have all of the divorce paperwork to hand as a first step!

Weddings and honeymoons can be done cheap, adjusting status cannot. This is one of those times where you may need to cut back on the unnecessary to accommodate the necessary.