While we wait for Vickie to give you a more informed answer, I'll hazard a guess....you are over training. The workouts you are describing are pretty rigorous for a 1st year powerlifter. I wouldn't do max effort every workout, I'd get on a cycle training type of workout until I've given my body some time to adjust to heavy lifting. Limit myself to 3 work sets (as many warmups as necessary) and cycle from light to heavier every 6 to 8 weeks. Max effort maybe once every 3 months. Westside is absolutely great but you need a better base and some training history before you jump deeply into it.
I'll share some personal issues. In college (I'm 61 so that was before anyone knew what training was like) I assumed more was better and worked out like a fiend...every christmas break I'd come back having lifted nothing more than beer for 2 weeks approx. and my bench would pick up 25 lbs. magically ...squat about the same. But I never picked up on it. When I was in my early 50's and benching 250-260, down 100+ lbs from my college best days (I weigh 180) I spoke to Kevin Farley, who trains natural power lifters and competes himself. I described my workouts (at the time included roughly 6 sets of very heavy lifting for each exercise ) and he said Whoa! you're an injury looking for a home. When I did less I got up to 315 in 2 yrs. after being stuck at the same wt. for about 10. Your body, or at least my body needs rest and when you are lifting near max effort your NERVOUS system needs rest, since what you are doing is training the central nervous system to simultaneously fire all the muscles involved. Listen to your body, it is giving you a warning....'work that intensely and I'll make you miserable, keep it up and I'm just gonna hurt you.'