<human>: Can you give me the gist of the text in a nutshell?

I work for a park district in IL as a full time summer employee and managed to get around 48 hours of work last week. When I told some of my coworkers how many hours I had worked they told me to make sure I check my paycheck and make sure I am getting my correct overtime because the people who do payroll have been bad about  "forgetting" to add days on weeks where people are getting a lot of overtime.

I thought they can't be that bad about it, no way they'll mess up my paycheck, but i kept track of my hours anyways just to make sure. Today I got my paystub back and amazingly enough I was missing an entire day from last weeks pay. After catching the error I called the supervisor to inform her of the complaint and her solution was to add it to this next paycheck.

Here is the problem with her solution, we had the 4th of July off so I am missing a day of work from this week . So I am pretty much getting screwed out of 8 hours of overtime here and am not really sure what type of recourse I need to take to get the proper pay from the hours I worked. Not only am I not sure how to deal with this, I don't think what happened here is legal at all either.
<bot>: Supervisor "forgot" to put one of my days from a week I worked 48 hours and is trying to add them to a 4 day work week.