Outerlymitz

Hello all! Long long time lurker first time poster. I have a question. I purchased my 01 leg gt brand new in 01. I have noticed that all the tires I put on the car has this horrible wear on the inside of the tire. I thought it was the alignment at first but when I brought it in for an alignment they said it was dead on. Is this a normal thing with the the 00-04 leg's? I have put three sets of tires on the car and none of them last longer then 33k with a 60k tire. Thanks!