Destruction Derby 64 - Incorrect Car Stats

I recently tried loading the Destruction Derby 64 into Project 64 2.3 and realized that the stats for the car care all displaying as max. This included the cars unlocked later. The actual performance of each car reflects the real stats (Ambulance is slow and bulky, Hot Rod is fast, etc...) but the stat bars for each vehicle is maxed (visual only). I verified the hash values for the file and they checked out. Does anyone know why this happens or how to fix it?