Same problem here. The two 1099-Rs are the same amount ($6000) but otherwise different. One is distribution code T one is code 7. The T coded one is because I accidentally took a distribution from my Roth and I returned it. The 7 coded one was from my Traditional IRA and converted to my Roth. The account numbers are different for each one. But TT doesn't ask for an account number. Someone suggested changing the amount of one of them by $1 or $0.01. I wouldn't feel comfortable having a difference between what I report and what Vanguard reports.
