Since this thread has been bumped I guess I'll provide an update on my ski pants tailoring escapade...
So I decided to use a local tailor instead of shipping them off to a professional. When I picked them up last week, I checked them over and they looked perfect. You couldn't even tell that they had been altered. The inner gaiters were perfectly shortened. The ski edge guard patches had been moved as requested. The cuff trim was reattached. The side zippers were shorter. They looked perfect.
So I get home and try them on. The right leg goes in and everything feels fine. I can see that they're the perfect length. But then as I'm putting my left leg in, all of a sudden my toes get caught up in a weird twisted up section inside the leg. I think that I just must have the pant leg twisted weird, so I try to kind of straighten it out and I'm able to get my leg fully into the pants. When I look in the mirror, I see that the left leg is totally twisted up and the pant leg won't sit correctly. The right side is absolutely perfect. The left side is a joke.
The next day I bring them back into the tailor and show them what happened with the pants. She looks the leg over and realizes that they did indeed somehow twist the inner liner and connected the right side of the liner to the left side of the outer shell (and vice versa). Oops. A big oops. So tomorrow they're supposed to be done being fixed and I'm hoping that they'll be perfect... on both sides!