Thats a pretty common complaint for the '95+ Conti. When I used to work for Ford/Lincoln, I would put the alignment as close to "perfect" as possible. This, along with tire pressure in the 35 area would bring good results. Remember, the heavy engine & transmission is up front and the front tire pressure needs to be fairly high.
Theres not much adjustment in the front for camber, so sometimes you have to move the subframe around to get things right. Who knows whether the alignment tech even knows how to do this, or even cares.
In my opinion, thats one thing thats wrong with American cars. They have very wide specs for the alignment. Even if the aligning tech put it "In Spec", it won't be good enough for good tire life on that vehicle. It needs to be as close to perfect or "Nominal" as possible.
Did you get a printout of the alignment?