I was being cautious, Phil! I once bought a cassette issue of an EMI(Australia) Rock & Roll compilation, two cassettes equalling the three LPs. One of the tracks had been a re-recording... from EMI, of all companies! Granted it may only have been one out of 60 tracks, but the thought of EMI doing this even once was disgusting enough! It proved to me that one can't even trust MAJOR labels. And when I bought an RCA issue of Roger Whittaker that had a re-recorded version of Last Farewell, that for me was pretty-much the last straw! That's why I've stopped buying CDs altogether and now only go for older vinyl 45rpm singles and EPs or LPs..
Why would United Artists, who owned the Unart label and the original recordings by Garnet Mimms and Little Anthony and their respective groups, bother to re-record the tracks? If they were re-recorded, they would be in true stereo, not electronically enhanced as they are here, so these must be the original versions, and whoever prepared the cover was just sloppy. Also, I know that Anthony had dropped the "Little" by the time his group were on Avco a few years later, so maybe he had already dropped it by this point.
If the cover only lists Garnet Mimms and Lee Adndrews as sol acts, it could be that the tracks are NOT original recordings, rather, they're possibly re-recordings done in some tin-pot studio, ten, twenty or thirty years afterwards. Unart should have a solid reputation for authenticity(being the music publishing division of United Artists Records) but if they're getting up to stunts like this, then who can we trust for authentic versions?
On My copy Garnet Mimms is spelled right, but Little Anthony and the Imperials is billed just as "Anthony and the Imperials", and Lee Andrews and Garnet Mimms are just listed with their name, not the group by which they are more commonly known.