The advice above is completely correct. Remember that ERAS (the application service) and NRMP (the match) are two separate companies / processes. Even if you did not apply to a program/track on ERAS, they can still rank you in NRMP -- and of course the opposite is true, a program you applied to (and interviewed at) may not rank you.
Of note, if you want to apply to a different track in a residency program, you can do so easily via MyERAS and it doesn't cost anything -- you are charged by program, not track, so applying to additional tracks within a single program is free. It is probably worth doing so, just so when they run a filter asking "show me all of the research candidates" you show up (although they will probably simply rank you no matter what you do).