I think this might partially be a case of doing some cleanup before you merge profiles.
Have you talked to the two PM's? Do you have their permission for a merge?
Your not showing up on either trusted list and without the PMs' approval it is no wonder that you can't merge the profiles.
As an Arborist, I can help you with this if you would like me to. Please send me a private email [McKay-2027| Melissa McKay] if you wish my assistance.