wrong rear hub?

[SuperRSi]

My late model 944T trailing arms were cobbled together from several sources. I bought the "trailing arms" on-line and when they arrived all they really consisted of was the bare trailing arm. Soooo, I took them to a local wrecking yard/ Porsche shop and they assembled the set. Now the problem is when I put the rear rotor on the hub it does not even begin to cover the parking brake pads. So I guess my question is wrong hubs or wrong rotors?

Thanks,
Randy