Someone is the Net54 or CU forums discovered a few years back. The overall consensus was that only Caminiti's card was double-printed like this. And I don't believe all four have this variation, IIRC, only this version ( *Denotes + INC. ) can be found this way.
Very similar to the 1993 Topps Russ Swann: not a printing flaw that exists in a variety of placements, but a variation resulting from a double-printing of the line.
Owner and creator of JunkWaxGems, online source for unlisted error, variation and oddball info from the junk wax era.