How do you report hours that vary week to week? after 8 years as a pharmacy technician

I picked up part-time shifts as a pharmacy technician and I am confused about how to report them. I do not usually post, so bear with me. 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.