Hey JonnyDex,
Remember that the zero coordinate of your 3D model must be located at the same position as on your real blank. If you have your workpiece origin (=workpiece zero coordinate) on the bottom of your 3D model, you must probe from machine bed. If you have your workpiece origin at the top of the 3D model, you must probe on the top of your blank.
You should not change the soft limits of the machine. You are fooling the machine if you do that.
The min-soft-limits and the max-soft-limits are part of the configuration and are fixed for your machine model. You should reset the configuration to its default on the ADMIN page and not touch the limits, but find the real cause of your problem instead, that is one of the above.
This is wrong. Don’t do that. You have to home exactly once, that is after switching the machine on.
Maybe you are probing wrong, please follow these instructions on how to probe:
With your gamepad, or with the Jog Pane, or with MDI commands, you must move the bit closely over the circle in the touch plate prior to start probing.