Thanks for your replies. The shop foreman at the dealership has been very helpful with this issue. During our conversation he told me they have their Hunter machine calibrated every 6 months and that he was as certain as was possible that it was accurate. When they had re-alignmed it previously he admitted the rear toe was out and that probably was why the tire was showing some unusual wear on the inside edge, as it had been rotated rear to front.
I think MB Doc is right and I'll look for another shop that can give me a second opinion.
The aggravating thing about all of this is that the alignment, wheel position, etc. had been nearly perfect beforehand, and all I wanted to do was to ensure I wouldn't experience unnecessary wear. It seems by having them align it I caused the precise problem I was trying to avoid! @#$%!