<human>: Can you summarize the given text in a few sentences?

I live and work in Maryland at a hospital and I just started a new job a few months ago. My team and I (there is a big batch of employees that started together in this role) have been told since the beginning that we should be staying under 40 hours a week as hourly employees, however, in the last pay period I went over by .3 hours because of my workload. On Monday I checked my time card and my hours were manually changed to fit within 40 hours for each of the two weeks that fell within the pay period (I went over .1 hours the first week and .2 the second week). I can only assume that my manager did this since they manage my time card and hours. 

At my facility we are to approve time cards at the end of the pay period to say that we agree with what we entered. For this particular pay period, I did not approve my time card because there was an issue with a break that I had emailed my manager and never got a response about. As far as I understand, you are not supposed to approve a time card if there is a discrepancy that has not been fixed. So as far as I know I have done the right thing. Not only was the discrepancy that I emailed my boss about not fixed, but my time was also changed to keep me out of overtime. To top it all off, the same thing happened to one of my coworkers. 

What do I do now? I don't care particularly much about those .3 hours but I am fairly certain it is not legal to go in and change an employees hours just to keep them out of overtime. I worked those hours and I deserve that pay.
<bot>: my manager changed my hours in the pay system to keep me out of overtime and I'm pretty sure that's not legal.