Also posted on the Analog Key’s page.
This problem I am please to say is now solved. I started a new Logic X session and re-entered set the Key’s as individual external instruments match the MIDI channels for each track. Set up the clock on Logic and the Key’s. The problem is now gone. So it must have been some sort of clock issue with Logic.
The weirdest bit is I’m sure the problem was happening without the USB connection or any MIDI previously. Anyway I’m pleased it is fixed am left with that unsatisfied feeling of never really knowing what the problem was. At least I learned how to test the hardware and reset the Keys.
Thank you for everyone’s help.
Looking forward to getting to grips with this brilliant music making tool.