Distributor refresh gone wrong

Orangepeel isreal said
Something to note about my distributor is that the correct replacement rotor is different than the one that is on there now. The replacement rotor won't even slide over the notch to seat correctly, so there is something fishy going on.

STOP right there. You should not have continued past this point! You need to get good parts.

There is a 4 page article at slantsix.org comparing caps and rotors from different manufacturers.