Incorrect Account Calculation and Duplicate Transactions

The Ending Balance on my account (checking, credit card, etc.) does not match the ending balance! This has been an ongoing problem across two different Quicken for Windows

files. If I leave the account and come back, it will usually correct itself. However, this is a painfully bad bug. Additionally and likely related, when changing the Categories on downloaded transactions, a duplicate transaction will show up on the line below. This duplicate transaction is calculated as if it is a real transaction. When I leave the account and come back it usually rectifies, but again, this is a super frustrating bug. I have been using Quicken for a decade or more and have never had this issue until recently (4-5 months).