believe it or not, occasionally you will see erroneous or misleading info on the internet

Yes, more fluff. Normally IMDb would put a (II) next to a second person listed with the same name. I'm guessing Sex Circus is an early work of proto-pornography, a la Russ Meyer's oeuvre. Incidentally next month will be Mary Astor's centenari-, centuri-...oh, I don't what you call it. She would've been 100 next month.