when I go REF ALL my Z axis will home, then offset itself, (WHICH IS NORMAL) BUT then it goes back very slowly and bounce off my homing/limit switch a 2nd time setting off my reset button and turning on my DRO to green. On my diagnostic page it show all LED lights on limit switches on. When I activate a limit switch in DIAGNOSTICS all the lights go out on my limit lights and all my homing LED lights go on. I can stop my machine using my limit/homing switches and reset them. Im operating my limit/homing switches NC so if any switch was bad I shouldn't be able to reset my system