And sure enough it's back in a stuck state and those same keys aren't responding.. So odd. So here's what I've discovered.
-When I first got the synth some screws were missing from the KLM-371 and board that holds the key assign buttons.
-I then added some screws to the left side of the this board just under the arp and key assign buttons and now I just realized, if I loosen one of the screws the hanging notes stop. Very, very odd that this board being screwed in all the way will cause some of the keys to stop working and hang them in the arp.
The board now hangs a little loose but works, when screwed in all the way it causes the mentioned keys to stop reacting and get locked into the arp and sometimes the chord memory or poly mode too.
My apologies as this is a bit of a phenomena and but I feel like I'm getting close.