When I was reconciling my August statement for my BNY Investment account, I saw there were lots of duplicate transactions. Almost all of them on the same day. I deleted the duplicates, but when I did OneStep Update again, they were all re-downloaded into Quicken. I had to delete them again. Now I hesitate to do the one step update. There were probably 100 duplicates, so this takes a while to fix. I'm using Quicken Classic Premier on Windows.