I've retested it several times thinking that I just did something wrong the first few times, but yes, I will be doing more tests. I did one this morning, and probably will do one in a little bit. I might even retest the tank water and the tap water and take a picture of it.
Of course I'm not really in a panic about it. I'm just confused. He's very healthy, he just got his new heater yesterday and is now finally at the proper temperature, no strange behaviors or anything. My other tank has been set up for over two weeks and isn't cycled yet.