NVC is just being difficult. I used transcripts also hoping to avoid the 1099, and w-2 fiasco. I just uploaded my 2 w-2's and 3 1099's for me, and my wife had 3 1099's I had to upload, including a W2G for gambling winnings. Thought they would be happy, nope, 76 days later they want more clarification of what a W-2G is. I think NVC is trying to be the new IRS. This is my last round with them as I wait another 76days for them to review the W-2G information I sent them. I was really impressed with the ease of the online things at NVC, but now it just allows them to shaft you faster and keep you busy why they slack off. As you can see the NVC is really getting on my nerves lately. Have over 6 figures of income on the tax transcripts, why they care about my tax methods is beyond me.
I saw your second post, hopefully it's right. I know next time ( If there ever is a next time) I'm sending everything and the kitchen sink. But that usually backfires also because they are not very bright, and ask for more things.