<human>: Can you succinctly summarize the text in 1-3 sentences?

I got a position through a temp agency to a manufacturing position about 3 months ago. Everything has been fine until last week. I work Monday-Thursday 10 hour days. Last week I was unavailable to work Thursday so I asked my boss if I could take the day off to come in on Friday (OT is available on fridays but is optional). Since I wasnt gonna be working Thursday, my paycheck would be the same as any other week. 

Well on last Friday when I was working I got a call from the temp agency telling me I would not be getting my paycheck that day because of an issue on there part and said  I would get it on Tuesday (monday was memorial day). I said that is fine and that was the end of the conversation. Got my paycheck on Tuesday (in full and with no issue) but today on Friday, my paycheck was about $50 short. 

I called the agencys 1800 number since I discovered this after hours and they told me that because I got paid twice in one week, the taxes are higher which is why my paycheck is lower. This came as a shock to me because, 1. I was not aware of this and 2. My recruiter never mentioned it. Now I am $50 short because of there mistake. I can't contact her until Monday, but I wanted to know, if I can do anything about this legally? I worked for that money but my paycheck is $50 short because of there mistake.
<bot>: Workplace screwed up and paid me twice in one week, this caused me to lose $50, what can I do?