I've got one of the MicroKinetics 1236 lathes with the pre-installed CNC conversion kit.
It took me a LONG TIME to figure out that the G92 command resets the counters to their current location and therefore I thought the thing was "losing it's mind" but instead it was doing exactly what I was telling it to do, I was telling it to reset the counters. The reason this took so long for me to figure out was that the manual TELLS YOU To use the G92 command in the beginning of each program and therefore I'd get through the program, then when the program restarted, since I'd left the axises in the final position of the cut, not EXACTLY back at the tool start position, the G92 command would execute and the counters would be reset.
What a puzzle! Since I've figured this out It's been a pleasure to use and hasn't had any issues yet.