Board Thread:Episode Discussion/@comment-1599757-20151212162645/@comment-27312496-20151212233709

70.27.57.119 wrote: Shit, the unnamed person Penny said created her may have had a daughter named Penny, who got into an accident, bunch of stuff related to what we've heard the General tell us this episode comes into play, and we've got  the current Penny (the acronym thing is a bit of a headscratcher though, and likely renders this idea as nothing)

Still a very good possibility that Penny's soul came from someone else.