If they do keep changing, it might be the string and cables. If the center shot is correct, the bow is in spec, the vanes aren't hitting anything, and your form is good, then I don't know what it is at this point.
Once you get it all set again, go through one screw at a time and set them with blue loctite... it won't happen again. Good luck! :)
If you have to, in a pinch, you can always mount the sight on the inside of the riser to get the extra left adjustment you need. I do agree with everyone else though, something's just not right. I've had several bows with the roller guard, and while I'm not a big fan of them, they haven't caused me any real problems. They do induce a little lean, but I've had no problem keeping a bow in tune with them, or the Nitro cams. Even though your arrows should be the right spine, have you tried dropping the draw weight, or shooting a stiffer arrow just to see what happens? Also might try relaxing the bow, then checking the cam bearings and axles. Got a Cat cam back from being dipped, and was having problems with getting tuned. Found out the guy that dipped it had not protected the bearing, and it was fouled up beyond repair. It was causing the bow to shoot erratically as you are describing.
all the bad news on the 2013 ryteras is starting to scare me ..... wait where is my bow....
Something is wrong. I would bet it's the Cable, Sting or drop. You may won't to give them a twist to see what happens. Give them a twist, set the center shot and shoot paper to see were that gets' you. Check your drop also. Had and issue with the fork on one of my drop away rests that was similar to what you're experiencing is. The fork was bent slightly and causes the issue
At the shot the string misses the string stop to the right now. I'll give an update when I got the the shop I have a back up bow on the way through km archery hut an alien z with the acu track cam I will get this resolved though.
Don't mean to beat it into the ground, but like I've said in other threads, correctly timed I've found nock setting is near zero, usually 1/16" high. And even today 1/8" high is acceptable - not me, but just saying.
Update. Bow is going in I picked up a Bengal pro instead of the alien z because I figured it would be more ideal for hunting, i set it up today. Nice little bow for sure. Dealer said there was definitely something wrong with the cams limbs or possibly the axles won't know for sure until we get it back in a few weeks.