I wouldn't let the two week waiting list stop you. The fact is that they made a mistake, and if they are a legit shop they will put fixing that mistake at the top of the priority list. If they give you any kind of hassle just remind them that because of their incompetence there is going to be an extra set of holes in your skis. This degrades the value of the ski as it limits the number of times it can be remounted down the road, and is therefore worthy of some kind of compensation. If they know this, they will want to get you outta that store as fast as possible especially if your willing to just settle for them remounting them in the correct position.