Positive camber = wheel sits more vertically. Negative camber = wheel sits more tilted, with the top closer to the middle of the car than the bottom.
Usually, a drop of less than 3" or so will only change alignment settings by a couple of degrees at most (usually less I think). It doesn't seem like much but it is a lot, especially for toe. They probably re-aligned the car back to OE specs which may have been enough to cause your tire to start rubbing on the rear quarter panels. Looks like you may have to roll the fender or take it back and have them dial in some negative camber.