I was just a ROTC kay-det, got RIFed in 92 on a medical. I don't count.
Yes you do, because you signed on to serve. If Uncle didn't want or couldn't use you, that's Uncle's decision. You served. Although that's strange terminology. RIF == reduction in force, which means the military is cutting back for one reason or another. Some of the guys in my ROTC class ('73) were voluntarily RIFed, but only to reserve assignments. Later classes had involuntary RIF "releases". I left active duty as a part of a voluntary RIF (late '75). A medical discharge, in your case from the reserves, is a release for individual cause, has nothing do with a reduction in overall force levels.
Unless you mean JR. ROTC, which is a different ball of wax. Or perhaps if you were non-scholarship and released in your first two years. I can't remember if those non-scholarship cadets, who have no service commitment, are enlisted into the reserve. I was a two year cadet, rather than the usual four year program. (Just had an extra two weeks at "field training") Come to think of it, we weren't enlisted into the reserve until we returned from that field training. We were civilians wearing Air Force uniforms, with no rank insignia of any kind. We didn't even have tape name strips on our fatigues, but just used the plastic name tag on those and on our 1505s (khaki uniform).