PM&R categorical has 36 programs with 103 spots and advanced has 61 programs with 294 spots. You have two options:
1. Like the above posters, if you plan on practicing in one of those 4 states, apply TY in AOA and advanced positions ONLY in ACGME.
2. If you don't plan on practicing in those 4 states, you can go through ACGME applying both advanced and categorical along with prelim-medicine to cover your PGY1, or you can do #1 option as above.
I personally think option 1 is better because it's easy to match into TY in AOA. You hear a lot of applicants fail to match prelim-medicine in ACGME every year and end up SOAP/scramble for a surgery prelim. Applying TY in AOA will save you a lot of trouble. Plus 294 advanced positions is a pretty good amount of spots for you to match into and PM&R is pretty DO-friendly.