Originally Posted by MSPeconomist

For this issue, if time and effort can't solve the problem, try contacting Kevin Pinto by email. His contact info can be found in this forum if you search. He tends to respond very quickly, often in < 24 hours and outside of regular business hours, and either to resolve the issue and tell you so or to forward it to someone who is responsible for fixing it. It will help if you have details of the DL AmEx card offer you used (for instance, can you forward the targeted email you received?) and if you can clearly explain the offer in terms of MQM versus bonus miles, which are treated separately in your account totals.

However, I suspect that he can't help with the PM/DM choice benefits problems that the OP and others are reporting.