GurkenSalat

Congrats! I hope our interview goes as well. I'm really worried I'll get very nervous and mess it up :S But that's just me...

They are; that poster was mistaken. That's basically the definition of overstay, days you spend unlawfully present in the US after your period of authorised stay ends.

From what I just read in the form instructions, a sponsor's household member only needs to file an I-864a if the sponsor plans to "make their income/assets available to the sponsor to support the intending immigrant".
If your father in law's income on the I-864 is enough to support a household of 3 (him, his wife, you), then your mother in law does not need to file an I-864a. See the poverty guidelines for household sizes.
Note: this is just my limited understanding from looking into this form and its instructions. More experienced members can probably tell you more.

Of course there's waves of minors coming. Not surprising at all. I'm sure it's a direct result of DACA.

Thank you very much! Sorry, I failed. Should have searched! But I was unaware of the existence of the wiki o_O This site is huge!

USPS are notoriously bad about this stuff. Sorry to hear you're having difficulties with them
I think USCIS should send you an identical new one for free... I acually doubt they'd make you pay for it again, but I don't know for sure. It is one of my fears as well, I wish they'd use FedEx or something, this stuff is important!
Good luck and I hope you get this resolved soon!

Welcome to VJ! When you have a chance, , it helps everyone using the forum. Cheers!