mine doesnt although they do jump out the water in the wild to catch food, but generally speaking if your fish is trying to escape there must be something quite bad wrong with your water
what were your full water test readings?
The best I can guess is that, by 2 and 3, you are saying your NO2 and NO3 were both 0. Are you saying you have a 0 for nitrIte and a 0 for nitrAte? What about ammonia?
Sounds like the tank is uncycled as the nitrate level would never be zero in a cycled tank. My guess is that once ammonia is tested for the results will be very high.
You need to either get rid of some fish or get a larger tank, you are overstocked. A 55 gallon tank is the minimum for one oscar by it's self. Your pleco is just a poop machine which makes it even harder to keep your water in check. Who I really feel sorry for is the con, that poor fish is stuck in a 55 gallon tank with two of the biggest waste producing fish you can get.