Neither the calipers nor the rotors are interchangeable from front to rear on these cars. Rear rotors have the parking brake integrated, and the calipers are completely different. Calipers CAN be installed on either side, but will only fit/work on ONE side, due to the brake line fitting & bleeder locations.
Chances are the rear calipers were changed, and the ones used were some off-shore copies that are not machined correctly.
Another real possibility is that the rear bearings are loose, allowing the rotor/hubs to "lean", causing the calipers to hit like that.
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"