Hello:
Is the problem that an advice is printing where the cheque should print and vice versa?
If so, you should open the cheque spec file and go to File | Specification Options to indicate the position of the advices and the cheque. In layout mode, you will always see Advice-Cheque-Advice but you can control where they actually print.
Further to Support's suggestion, I would choose File | Open and confirm that there isn't another cheque with the same Title.