I have the same problem. I just moved to PA from Indiana. I have a FL license but with my IN address. I didn't get a duplicate IN drivers license before I moved and since have changed my license to PA. I'm in the process of applying for my PA carry license so I'm waiting. I went back to IN and tried to get a new drivers license by saying that I had lost it, but the computer said that my license had been changed already to another state. A couple of years ago, this wouldn't have happen, but computers are making the process of keeping track a lot easier.
The cop down at the Philly PD said that I could carry as long as I don't do anything stupid while my license was getting process because I have a FL license, but I thought this was a stupid comment because technically my addresses don't match on my permits. I don't want any hassle with the PD, especially, if I get some dumb as racist or reverse racist police officer or better yet a liberal one that is stuck on him or herself.
Don't even bother changing your driver's license unless you have to. My suggestion. If you are in the armed services, you'll probably be able to get away without changing your license. I'm a student now and I could have gotten away without changing my license, but I was buying a new gun so I had to get a new license in PA.
Be Safe.