Cadillac 03 CTS Timing Messup

Hello, so I have a cts that needs timing adjustment for cam shaft 1 and 2, I did it the first time but I did it completely wrong and it was still out of time. So basically what my friend and I did was loosen both tensioners, take the belt off the gears 1 and 2 while 3 and 4 were locked up but not the crank, then slide the belt a few teeth clockwise. So this time I watched the video and I understand how it all worked so I turned this time back to starting position but after taking the bolts out of the harmonic balancer, 2 of them were stripped and rounded so I am unable to get the wheel off the crank. Anyways so once I line up the wheel I realized that cam 1 and 2 were off by a quarter turn! Then a different friend helped me and suggested we take off the belt some other way to readjust everything and we did so by taking off the left tensioner. But after turning cam 1 it wouldn't budge it just sprung back like a tensioner would, and with enough force it would snap 180 degrees. I'm scared I screwed this up if anyone can help me I'd be much appreciated! This is my first time working with any timing belt (clearly) and I dont have much of a mechanical background other than your basic oil change.