Re: Unspecified edition
That's the way I've always treated it. If they want a specific printing, they need to ask or select someone who has set that attribute.
Now for the separate topic of people not understanding Chronicles or the difference between Unlimited/Revised/4th, that's a whole other can of worms...
Re: Unspecified edition
My advice is to always confirm details in trade chat if nothing is specified. If I don't care which edition, I'd just say "I don't care which edition the _____ is."
If I did have a preference, even if not specified in the wishlist, I'd just state, "I'm only interested in the M11 version," or something similar.
Communicating helps prevent misunderstandings.