I would be frustrated with the back and forth too. But I also know insurances are a pain in the butt. Also in the states insurances are jacking around because of the affordable care act. This has put a lot of providers on the fence (my PCP and T included). He may have battled with them and founf out this week that he is stuck. Also with the last appointment being in Sept - sorry but it makes sense he has not been able to just hold a slot for 3 months. If you like your T I would tell him that Id take the less frequent appointment but want to be on the list for the first regular slot available.