Job Billing Date Entry

In Sage 100, computer time was posted to a project. The time was billed yet continues to show up under the project each month as you process billing. I have tried to remove it, and it still shows up. I then tried to do an job posting adjustment, only to now see all the lines and a zero bill. Although, it is great that it shows zero, I would like all lines to go away showing the computer time as it should not be on future invoicing. Any ideas on how to fix this issue?