Summary:
When a user who's scheduled to work in a certain day / time frame has punched in or out wrong time / time against the wrong day, the List Schedule Discrepancies shows a warning, and displays the correct schedule.

Resolution:
Log in to Web TimeSheet with administrative privileges.
Click on the Administration tab in the top menu.
On the side menu, select Permissions under Users/Departments section.
In the users permission, click on the Edit button.
Expand Scheduling by clicking on the '+' sign beside it.
Uncheck View Schedule Discrepancies on Timesheet.
Click on Save.