As mentioned, this problem is still the same as vanilla in Project Balance, but it and other vanilla bugs like it have been corrected in the EMF beta now:A small bug with regards to the become marshal/chancellor/etc. ambitions is still present. The way they are coded now, due to a vanilla bug, you don't actually receive an opinion bonus from a courtier whom you appoint to a position he/she desired. Quoting an earlier discussion about this bug:
I'm using the EMF 1.1 Beta version. The fix above works for me. I believe this was corrected for Project Balance, so it might be a fix that was not applied to your branch.