Haas TM-2P adding -5” to part Z touch offs

Beginner CNC user (self-taught via Titan Academy) having a problem with my Haas TM-2P. It's adding -5" to the Z-axis part touch-offs, even after recalibrating the part probe twice. This happens whether I use the probe or a tool to set Z. The tool probe works fine. This extra -5" is a huge problem, especially for a beginner, and makes the machine feel unsafe. Could there be a hidden setting from the previous owner causing this? It should be a simple touch-off and go, but it's not.

Any ideas?

Check my profile for a video of the error.