How long does it take to go through detox for multiple substances? Because it sounds to me like it is way too early for him to be working out and "doing great" and making phone calls to DMW.
Well the advantage of excusing his absences is that he may stay away longer. Also, nobody wants to do something that could be seem as getting in the way of Rob getting treatment for as long as he needs it.
So, if Rob is really at some sort of fat farm, as Doug's comments suggest, how easy would it be for him to bring in enough booze and drugs to keep him out of withdrawal? Makes me doubt that he is in any kind of program at all.
I've wondered about FAS/FAE as well, especially with Rob and Kathy. Could also be just what Rob has done to his brain over years of drugs and heavy drinking.