Thank you for your prompt reply. I have reversed all the corrections I had made and manually re-reconciled the bank transactions. I still get a reconciliation error but can't relate this to the journal entry that it references. All the bank deposits are reconciled. 

I have attached a screenshot - it shows the reconciliation error summary. The second line doesn't make sense - why is the difference between 11 and -574.17 = 11.00? Have all my changes confused QB? Have you any suggestions? Should I re-enter this journal entry from scratch?