Odd that your “no reply” message is timestamped an hour before the original question.
Not many people are familiar with the MDR, so you may not get much helpful advice. I would first make sure that it’s not a problem with the dop. Rotate the dop 180 degrees in the quill and see if you get the same measurements. I don’t know how the dial indicator works on that machine. Most indicators measure angle, not distance.
Anyway, good luck, I hope someone familiar with the machine can answer.