They say that 3 mounts is the mas before a ski loses it's structural integrity - I personally think it depends where the previous mounts have been. If the holes haven't been too close together then mounting a ski up to 4 times is doable, but generally if the hoes have previously been quite close then 3 times is about the limit.
If they messed up twice already, demand new skis and go to another shop to get them mounted. Having them mount your skis up incorrectly once is fine, but twice is crossing the line.
me: "you should just say you're 17"
mikey:: "But wouldn't she know when she like (mutters off) downstairs"
me: "You have a small penis, don't you"
miley: "well not very small, but..."