Stroke patients are regularly referred to PT, so that is a sign of inexperience. Personally, I would not feel comfortable going to PT somewhere that had never worked with MS patients.

10 minutes is a long time to be on a bike if you have trouble standing from a seated position, especially if they are working you out after that.

I would ask to meet the head guy at the center to go over your medical history and have him take a look at your care plan. I'm sure that he has worked with stroke patients. Maybe he will have some worthwhile input or can refer you to a PT there who has worked with stroke patients.