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

Okay so just a little background info, I work for a newspaper at a college in Texas as a staff photographer. I shoot stuff anywhere from campus life, concerts, sports and breaking news. I am paid based off shifts (hourly) for the majority of stuff I cover for the paper. The one thing I do not get paid for is shooting football games. My job states it is a "privilege" despite the fact that the work day on days of football games is around 7+ hours. I am not complaining too much on the fact we do not get paid because I am really big into sports and to shoot high-level sports is a great opportunity.  

So to get to my question/concern. When I first started working for the paper I first and foremost did not sign any documents pertaining to anything copyright related. When I get cool photos while on shift I post them online(Facebook, Instagram, my website, etc) and no one had a problem with me using my watermark, until my first football game(unpaid). I posted photos from that day online and my boss tried to tell me that if I use the newspaper's equipment, am under a press credential issued by them or am being paid, they own all the rights and I must use their watermark when posting to my personal account. I did some research and am not sure if it is true but read that the paper can only tell me what to do with my images if I am being paid. The credential and use of gear just implies the newspaper can use my photos. I am wondering who is in the wrong, and what are the actual laws on this sort of instance. I do not have a problem with them using my photos whenever they want becuase it is a win-win for both sides. But I do not want to use the paper's watermark on things such as my website, plus the way they have the watermark setup is it resizes my photos at the same time in photoshop, which degrades online quality. I asked my boss about this issue with the watermark and he basically told me to deal with it...

Any help is greatly appreciated. Thanks!
<bot>: I work at a newspaper as a photographer and they are trying to tell me I must use their watermark when posting to my own social media accounts when posting photos I took for them, paid or not.