Kept centered "exactly perfect". As to why, my amp doesn't have a balance control. Even if it did, I sit dead center to the speakers so wouldn't make use of it anyway. I also believe my hearing is essentially the same in both ears. I'm unable to answer your question regarding the clip light coming on.
What position is your balance control set at and why?
For best balance and sound mine is set at 1-1:30. The right channel always seems lower. I have some hearing damage in my right ear from listening to car stereos in my youth. I’m 56. I do have ringing in my right ear but not the left. I have very bad sight out of my right eye which surprisingly make a difference in hearing. The left eye sees the left speaker most of the time and there must be some pyscho acoustic effect because if I close my eyes some of it goes away. My clip light used to comes on and stays on maybe every 2-3 weeks and I would unplug everything and it would go away. Until I discovered if I stomp my foot hard it goes away! Funny like a plumber coming in and beating a pipe with a hammer and charging you $150!!!! The sound doesn’t change when that happens. Go figure that. When I had a cable with a network box it would light up quite often. In the last 3 months I have changed out all cabling with Pangea interconnects and Canare 4S11 speaker cable. Is there some kind of low voltage issue with the right channel that would make the clip light come on even with any music playing???????