I've never counted college terms towards retirement. It changes the modes for service to 2 and 5 terms of service when college is expected.
In CT/MT, neither as player nor as referee, I've never had players attending the college (I had to the Naval/military/merchant accademies), nor many ones that stayed in career long enough to earn pension, so I've never had the problem.
For those attending an Academy, I counted the term for mustering out, as it was not until MgT that I read they don't.