What's wrong with Reconcile?

Holderman

All entries have been tagged, but Difference won't show as 0 (zero). Instead, it adds the cleared and statement ending balances together!

Last month was fine!

NotACPA

Have you manually changed the CLR status of any transaction?

Have you changed the status of any Transfer (in the other account) that would have impacted this account?

Have you changed the amount of any transaction with an "R" in the CLR field?

Have you changed the download method (say, Direct Connect to Express Web Connect) of the account, which due to a bug can change the Opening Balance of the account.

The "Prior Balance" in the reconciliation dialog is a calculated, not stored, amount. It's the sum of ALL (past, present or future) transactions in the account that have an "R" in the CLR field. So, if any transaction gets changed that impacts the CLR, then the Prior Balance will be off which will throw off Reconciliation.

SO, try looking at your last month's reconciliation and see if the numbers still work. If not, that Opening Balance might have been changed. To figure out the correct OB, Restore a backup file (from a month or so ago) until you can ID the correct OB. SAVE that restored file to a different name, so as to not overwrite your current production file.

Also, record in the Memo file of every account (except Investments) that you download into what the correct OB should be … so that if this happens again, you can easily spot the change and know what the correct amount should be.