Buying two new tires shouldn't really have warranted an alignment, as long as the tires were balanced properly if the car was aligned well before, it should have been fine. I'd definitely see what the heck is up, I wouldn't even trust a place that did it by hand without an alignment rack with a laser system.
2012 SGM SEL Sedan 303a w/o Nav | Job 1 built 6/2011
FSWERKS Cool-Flo w/ ITG Filter | FSWERKS Stealth Exhaust | 17x7.5 Axis Sport XMX Graphite wheels
Sonic Crew #28 | Rally Revolution #117