I have found in life that sometimes situations are a Catch 22. I feel certain that if it had been time for this Lt. Col to re-up he would not have re-uped. Naturally, you can't just quit the military and even if it had been his re-up time, the military could extend his time anyway. Once you are in the military they own your butt for life. You can be recalled at any time they need you after you have left the service. This happened to my oldest daughter's husband during the Gulf War and to a friend of mine, who is now deceased, during this Iraq War.
With that said, this Lt. Col for whatever his problems may or may not be, and whatever his opinions are, didn't want to deploy back to Afghanistan. I'm sure with his years of service he was well aware of what they would do to him.
Side note: One thing I do find interesting is that to the people (civilians) who are so pro military they forget the fact that these men and women are human beings with feelings and not robots. We are finding the just "suck it up and do it" days are not working so well, thus the need for continous redeployments due to few new recruits. When my middle daughter's husband, who is career Army, came back after his first deployment to Iraq, he was sent to NYC to do recruiting, he did not like it at all. Recruiters are treated like crapola, high stats set they can't possibly meet, because people don't enlist like they use to. After 2 more tours in Iraq they are counting the days til his retirement, but they are also aware the Army will always own him.