Try going to the Accounts tab. On tap on each account and tap the "History" button in the top right. You'll probably find a bill that was inadvertently created.
Also, go to the Bills tab, tap the total section in the bottom right and make sure it's set to "All Bills" then tap Done in the top right. This is a filter that lets one see bills within a particular category. BTW, help for our products is easiest to get at
http://forums.return7.com.
Please expect longer response times from me as I just had a baby.