My arrows are hitting target at angle. They are striking target and knock is 2 to 3 inches to left from center.
My initial reactionwas underspined but looking at your post as a whole, 4560 terminators at 29" and 55# draw weight with 100 grain tips and 5" feathers, I'm not so sure.
So, first thing I'll recommend is to doublecheck your brace height. If it's snuck down too low it can really play havoc with your arrow flight.
Then you added inthis bit...
I also noticed it gets worse with repeated shots.
Getting worse with repeated shots makes me wonder if maybe you aren't getting tired and short drawing on repeat shots.
So, my recommendations. Check your brace height. Make sure to not be machine gunning your arrows at the target. Take at least 30 seconds between shots to let your muscles recover, and be sure to draw fully on each shot. Just for grins, try some 125 gn tipsand see if they make your arrow flight better or worse.