bank reconciliation

Hi ... I was doing a bank reconciliation and when I went to reconcile (click on) one of the bank deposits - it gave me an error message and then automatically created a deposit amount in the bottom screen.  I clicked to un-reconciled all the deposits to get it back to zero but the amount is still there even though I didn't reconcile any deposits.  I'm thinking that maybe the AR clerk's posting had a error - maybe posted to bank.  Anyone experience this?  Just wondering if there is a solution.