Why do you think in the NFS wizard the Z start is ~1.5 inches to the negative with Z start set at 0 and in the other wizard the Z starts at 0 with the Z start set to 0?
Can you see that in the tool path window? Every time I go to run the program it retreats in Z- and hits the limit switch. Well into my part, not at the face?
Wait a minute- which way do you have Z moving? A positive Z move is toward the tailstock. Moves into the work are in Z negative direction. That is the established G code convention. Note the wizards safe Z move is to Z 1.5 (positive). That is toward the tailstock, away from the work.