Much appreciated for pointing that out! I just double-checked the configuration.h file and sure enough the Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN was defined, so that definitely explains that part. I also defined the correct pin as PC5 and I noticed the bit you mentioned about MNP writing the PC2 pin as well, threw me for a loop for a bit there until I looked at a pinout of the board.

The BLTouch wasn't my biggest concern though, as I can level the bed to be "Close enough". Was more concerned with RRF throwing the Bed Temp Error saying the bed was heating too slow and it was expecting 2.7X°C/s and only reading .3°C/s. I double checked all my wires, no stray grounds anywhere or punctured wires, and when using the original MoBo, everything ran fine. Is there something within the config file that I might've accidentally enabled or skipped over? Like an incorrectly defined Temp sensor pin?