Mario,
I came into the store this morning to try out the harmony issues you mentioned. Here's what I found out.
Yes, when using the piano voices along with harmony on, you can hear a triggererd sound when you release the key after playing a chord with the right hand. Not all sounds do this. I tried clarinet, trumpet, Sax, flute and all these didn't respond like the piano did. I then tried this on the X1 and the SD1 and all did the same.
I will be talking to the right people at Ketron about this next week to see if I can get an explanation as to why and if this can be changed.
George Kaye
kaye's Music Scene
Reseda, California