Well, swimming is a killer for making people hungry. I get wet and start to feel hungry
I'm guessing you're doing the 5 meals a day properly, and you got the fat increase, although try going to X3, it'll just give you a bit more energy. Have you been in the Zone long?
You're almost my height but I weigh 22lb more than you. I'm at 16 recommended blocks but I take 20, and I'm not killing myself doing exercise like you are, but then again I will have a bit more muscle growth. What BF% are you at? And LBM? Also, how old are you? If you're in your teens your metabolism will be much higher and therefore you will need to increase your blocks *hides from Sue*. Have you noticed any strength loss or muscle getting smaller recently?