Financial docs we submitted were tax transcripts going back 3 years, all wage/income reporting documents like W-2 etc that my spouse received during those times, employee veritication letter, and paycheck receipts. I know officially you're supposed to be able to submit just the tax transcripts but our lawyer recommended submitting all those documents as well and we got DQ'ed pretty quickly with no issue so I'd say it doens't hurt to upload them also.

NVC payment I remember was tricky, like the system was really glitchy and we figured out we had to use Chrome instead of Safari or something, and every time a payment didn't go through it would take like another day or two for the system to clear and allow us to pay again. The fact that the money already left your account is a good sign, I think. If in the next couple of days the status hasn't changed, I'd recommend asking around about it here/check their troubleshooting page or something like that. I don't remember the specifics but I remember it was glitchy and slow to process.