Documents apparently downloaded from Vanguard, but data not appearing in TurboTax.

Vanguard 1099's appear to have downloaded ok in that they all appear in the Import Summary of documents downloaded; however, two of those 1099's do not appear in the forms displayed under Forms, nor is the data from those two 1099's included in the tax calculations. Can I just repeat the download from Vanguard, do I need to delete the downloaded documents and start again, or should I just enter the missing data manually? Thanks.