[LCpl Lamm]

I have a couple questions concering PT.

I have a Weight Training class at my High School, we lift weights for an hour on Monday/Wednesday/Friday...Tuesdays and Thursdays we work on speed and agility, we do sprints, foot work, etc.
When I lift, I do core lifts, bench, squat, clean, and deadlift, plus a couple other auxillery lifts. After school, I lift weights for about 30-40 minutes, all auxillery lifts.
MWF-pull=ups, sit-ups with weight, barbell curls, tricpeps, shoulder complex, and lats.
Tues/Thurs-pull-ups, sit-ups with weight, toe raises with weights, and a squat exercising which names escapes me at the moment.
After I lift after school, I go to Wrestling practice, we run, then wrestle. Then I sometime go home and do callisthenics-push-ups, sit-ups, etc.

Anyhow, to get to the point. Is this too much. I don't hurt myself, so I should be good to go. But the past week my bench max has gone down, a long with my clean max. Could this be to overtraining, or due to my muscles breaking down and reforming?
Also, should I be doing pull-ups everyday? And should I be doing sit-ups with weight?
I asked someone else this, and they said don't work the major muscle groups everyday, only every OTHER day. So, pull-ups, sit-ups, should be done every other day.
Opinions, advice would be greatly appreciated. I'm doing all this work for a few reasons-wrestling, track and field, and USMC boot camp.
Thanks,
Lamm