After over two years with pbs, I've never had this happen.  I put all editions of a particular book on my wish list TODAY.  A few hours later, my wish is granted on two different editions.  I know that I'll have to let one go.  I just accepted one of them (they are both paperback).  I'll wait one day, just in case something happens to that, and then I guess I'll decline the second.  Who knew books that were not listed (I put them on my reminder list to check first) woud become available so soon?

I had the exact same thing happen to me! I had this book I read at the library and put it on my WL here, then a couple days later there were 2 posted to my WL! I had all versions on my WL... I just remember looking at them and thinking uh, paperback or paperback? They looked the same but had different ISBNs. So I just Eeni-Meeni-Minee-Moe and picked one. I was glad to have the book, it was just eerie.