Hi, Luis
The Active Low/High settings in Config, Ports & Pins shouldn't be used to reverse directions, It's for setting rising & falling pulses (some stepper controls are sensitive to this)
Reversing should be done in Config, Home & Limits, Z up is +, Left fwd corner of your table should be 0,0 spindle to the front left of table.
Then X,Y are Positive Spindle moves right and back of your table. (most set them that way)
Maybe I'm missing something hear ?
Thanks, Chip