I'm sure that you have discovered that your son's incarceration is similar to being behind the old Berlin wall.
The truth is that the department of corrections is essentially a hands off institution. You are not likely to receive much help from the outside. I would tell you otherwise, but it will probably make matters much worse to attack the counselor at this point.
Your son needs to be overly cooperative and just finish the requirements. After he is released is the time to file official complaints. Now, on the other hand, should it appear absolutely hopeless to satisfy the detention authorities, you might consider hiring an attorney to force an internal review. Even then, the facility may simply ignore an attorney.
Here's the problem: however long he was sentenced is the amount of time that the facility can keep him, period. Parole and any early release are matters left entirely up to the department of corrections. You might possibly gain some input through the parole board, but again, I would use the services of an attorney.
I know that is not what you probably wanted as an answer. However, as with any similar problem, I do recommend that you sit down with a good criminal lawyer and review all of the documentation you may have. There is no substitute for that.