I have seen this sort of thing happen a lot. I think it is the combination of burnt out staff and alcoholics who have alterior motives for treatment. Not that your son does...don't take that wrong...but it almost as if they make them call a number of times and then give them short notice. The bottom line is that there are more alcoholics than beds so they make them prove they are sincere.
Hugs and welcome Mom...I am a mom too of an alcoholic.
I am betting if he perserveres he will find a place!
JT