Hello there, @hello266. A quick way to resolve the incorrect time for contractors is to go to the Weekly Timesheet page, then find the incorrect week so you can remove or edit the hours entered.
To do this, click the All apps > Time > Time entries > Launch QuickBooks Time > Time Entries > Locate the wrong entry > Pencil or Trash icon, then edit the hours entered and click Save.

Don't hesitate to comment below if there's anything else you need assistance with in QuickBooks Time.