RobotStudio event

Two axes positioner created with the external axis wizard

RobotStudio 5.61 and 6.02 with the externalaxis wizard create from two external axes (M7DM1, M8DM1) a robot _type of GEN_KIN with two axes. The baseframe calibration of the positioner shows only 3 point methode and shows no axes. If I use instead of "GEN_KIN" a robot_type "ORBIT_160B_1" the baseframe calibration shows now a 4 point methode with two axes. What is the reason?
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