This is more of a USNA question than a DoDMERB since now you are inquiring about TS which has nothing to do with DoDMERB.
Honestly, IMPO every branch has a magic number for experimental compared to not experimental. Hence, ask this on USNA.
That being said, what trips people up is the number changing years later.
Are you saying if 3 is the magic number, you will now shade it from 4 to your original 2? If so, doesn't that go against the honor code?
I will say that of you look in the bowels of ROTC forum, there was a cadet dis-enrolled as a junior because he changed his number 2 years later from 2 to 3, and that is how AFROTC saw it. I have also read posts where 2 is the magic number because they see it as experimental, and I have read threads where there were some that did it 10 times. Hence, I think it is the branch and being honest.