I mean if one of the cells is, say, 50 amp hours more full than the others, then the BMS will stop the charge on all of them when the fullest one hits the top. Right? Then if they are disconnected and rearranged in parallel, they balance each other out. But that is seeing as effective top balancing when the other three weren't full anyway. So why can't they be balanced in parallel at any state of charge? I'm clearly new to all this and unclear on some of these details. Thanks for the input.
Also, I've been noticing that the little toggle switch and the BMS app that says balance likes to be off a lot but doesn't respond when I press on it. I have seen it on at least once though.