Wage reporting when hours change weekly after 8 years as a production planner

My hours change every week at my new part-time job and I am afraid of reporting wrongly. I do not usually post, so bear with me. Sometimes my paycheck is late by a week. Did anyone get an overpayment notice from a mistake?

Thanks for writing this out. I went through something close to it 8 months ago, and it settled down once I kept a simple log of every call and form.