Wage reporting when hours change weekly after 12 years as a data-entry clerk

I picked up part-time shifts as a data-entry clerk and I am confused about how to report them. There are 12 people counting on me, so I am trying to be careful. Pay posts on a different day from when I work. Did anyone get an overpayment notice from a mistake?

Report honestly and keep your stubs. An honest small error is much easier to fix than a missing report.

The claimant handbook has worked examples for part-time pay. Mine was clearer than the phone line.