These results would make me much happier than what you got the first time! I might even increase the volume knob on the sub a bit further and re-run but that would likely not change things much.Ok, I was able to rerun ARC with the following changes:
1. Moved the center speaker forward on the audio rack
2. Increased the sub gain slightly
3. Kept my five mic positions much closer to the main listening position
4. Used the other Anthem mic I had (I don't think this one mattered)
I think the results are better, at least none of them are maxing out at +12 anymore, and the sub is more reasonable at just +2. What are your thoughts of the new results?
All the other advice you are getting (to measure using REW, look at individual speakers, etc etc, if you have the time interest skill or patience to develop the skill) is ALSO good advice.
I think you have solved your biggest issue(s) with the small adjustments you have made and the new measurements.
But there is always room to improve even more, with additional work, if you are game. End of the day, ARC is one of the best auto EQ systems on the market. Some would say it is the best. (I would tend to agree.)
But that does not mean it is smarter than a human with excellent measurement practices, patience, and knowledge to adjust things even further.
The other thing to consider, of course, is whether there is a better location for your sub, and whether you can accept putting up some acoustic treatment on some of the walls (and maybe the ceiling).