OMG tonite I though I had the ghost note thing for sure. One sustaining note would not go away. Panic no effect. Reboot no effect. Multi/Single swap no effect. Reading a few threads, checking settings...I noticed my side table gently pressing high C.
Sometimes it pays to be a idiot noob LOL
Next, suddenly my Sl-880 was not playing it's part on the virus channel 4. The JV1010 and Proteus 1 were singing away on channel 4 to the 880.
Then I remembered when I was trying to fix the ghost note, I'd pulled my MIDI DIN, and only replaced the out, leaving the in unplugged.
Now a good synth would have replugged itself, right?