I just stumbled upon this thread today. It looks like several of you have been searching for June Bug for quite a few years. I can take some of the mystery out of this. June Bug was an alias. She was married to George Alpert, who owned all of the labels she recorded for, such as Palace and MVM. George was a fascinating guy. I recorded several albums for him back in the sixties and learned a lot about the record business just by being around him. He was a master of creative, if not always honest, packaging. That confusing substitution of June and Nina Simone is one example. Another is June recording a multi-tracked cover album as the “ choir of nuns” in order to capitalize on a big hit of the day called Dominique. June was no more a nun than I was. With the exception of Folk Art records, which I cut two albums for, every one of these companies that George owned were what used to be called “budget LP” companies. The albums sold for $0.99 so nobody was real picky about them if they weren't quite what you expected. It was all sort of a game to George and he had lots of fun doing it. I'm sure June (I don't remember her real name) had fun playing along with him, as did I.
         I hope this helps.
Hank Davis