Follow Up Thoughts...
I have noticed that when I move the battery selector switch to the house bank and DON'T change the sense on the Link, the bank seems to keep charged, it just doesn't seem to do so as fast, so it appears to be polling both batteries as you said it should. However, I need a lot more time with it to really make a solid determination. Anyhow, it sure was fun sorting through it all. Based on your experience, I can't imagine Xantrex customer support wading through all this to give an opinion, so I'll let this sleeping dog lay. Rick D.