Oh, crud. Obviously I misinterpreted your meaning, acs. Or perhaps over reacted to what you were saying, me being up on my soapbox and all. sorry. I took "issue" to mean disorder - which is just how I interpret or use that word.
I agree with you about the OEs. My son is the same way as yours, often focusing on some sensory aspect of an activity or task and then not being able to participate fully or complete the thing. But I just see as part of who he is and something to be accepted and accommodated.
Lori, have you tried a local college job board? The wording of your ad and the interview process should help identify the "right" person - you'll know when you find him or her. Do you have a local YMCA? Maybe private time with an instructor to build confidence and abilities? I don't think there's an easy answer to this situation. But if he is motivated to learn I'm sure you can problem solve a solution.