Bill sorry but my mind wandered from your post to my personal emotions about keyboards.
The KMA was never made to do what a flagship keyboard can do. It is simple to use when understood, but not good for any in depth creating which is who you are. The manual must have been written someone on another planet; but there so many good people out there and nice tutorials that made the job easy. It is a fun machine and no more. Size, good sound, and good styles but no more. 
I said this before; for my type of use the playing and performing, the KMA would be a keeper if I did not own a Pa800. I have been told by people like Rikki who does a lot of programing and at one time owned a Kn7 that the sequencer in the flagship models is easy and offers so much more than other keyboards. She is ready to walk me through whatever I need (A great gal) but my need is performing. 
Up to date I have only done easy record. Recording; pads will be my next step. Most of the hype about Korg keyboards is coming from the Pro. Players – not good for everyone needs.
So----- KMA = Fun and is toy-like, no more. If it were not for the size it would have been sold a long time ago.  
I betting that the Korg people made this keyboard for a dual purpose; the second reason was to create interest in their flagship models --  and that is what has happened. 
Take care, John C.