Last night I couldn't get the park to work correctly. I discovered that there was a firmware upgrade available and among the bug fixes listed was something that indicated it should fix the problem.
Doing the firmware upgrade was easy. I followed the instructions here:
http://www.ioptron.com/v/firmware/CE...areUpgrade.pdf using a USB to RS232 converter. I upgraded the hand controller and the mount firmware. After that was done, I did the recalibration of the RA and DEC encoders, and did the search to zero position - all good.
After selecting the parking position I wanted, I did a test and now it's doing the park as expected.