I am trying to avoid qualifying for DM in order to carry over the MQMs and instead just quality at Platinum. I have arranged my travel schedule (by avoiding some Delta flights) to end up 300 miles short of DM at 124,700 miles. I have heard that Delta will arbitrarily qualify people close to the threshold to DM, and that there is no way to prevent them from doing so or reversing the decision they make. Is that the case? And if I am so close to DM, is there anything I can do to prevent Delta from moving me up to DM. I am currently DM, but really have found no big advantage relative to PM, which I had been for the 10 prior years.