Insurance adjusters, have you ever heard of a 2hour long FCE/FCA?

Case out of Minnesota, live in Ohio and getting treated by ohio doctors. My surgeon has found me to be at MMI. He wants me to have an FCE/A completed in order to make a determination of permanent disability. The facility that I was referred to reached out to schedule, and while on the phone she scheduler stated that all their FCE/A's are scheduled at 2 hours. My rehab team and lawyers office feel that 2 hours isn't long enough to determine the level of work I can do and they want me to call around to find another facility to have this exam competed.

Need some advice on this.