I started to do a regular monthly credit card reconciliation (using QBO) and got a notice saying I was off by $20.08. I looked at the fix it suggestions and could not find where I was off. Every expense that had been modified, there was no difference between the beginning or changed number.

This happened last month too and I undid the prior month reconciliation, redid and then it was balanced. So I decided to try that route again for this month. Now the prior month is off by $5,732.69. How does this happen? Any suggestions?