I think we're missing a little bit of important info. I was in the same boat as Eagle, as I had my PPL before going to AF UPT.
After graduating and taking the military comp, my license read:
Commercial Pilot
Airplane Multiengine Land (Limited to Centerline Thrust)
Instrument Airplane
Private Privileges
Airplane Single Engine Land
The Private Privileges were just associated with the ASEL due to the fact that I never demonstrated CP proficiency in a SEL airplane. It has nothing to do with a restriction on the CP part of my license.
For guys/gals that didn't have a PPL before UPT, one of the local flight schools had a deal set up where they would fly for an hour or two of instruction and take a Commercial check ride in a SE airplane, removing the PP restriction from their ticket. I was too lazy to do that, and now I'm kicking myself, I'm an Multiengine ATP with PP privileges on my SEL.