I have two copies of the same book and had 3 wishlisters.  I posted one copy and it was requested but is waiting to go in the mail on Saturday.  I just tried posting the other copy of the same book which now has 2 wishlisters and for some reason, it will let me post it, but it doesn't show up on my wishlisted books list or on my shelf.  Does anyone know why?  Do I have to clear the other copy out first?

You can only post one copy at a time. Once the first is mailed you can post the second copy.

Can I post multiple copies of the same book?

Not at the same time. We allow a member to Post only one copy of a book at a time.

• If you have two versions of a book (same title but different ISBNs):
  • you may post both, as some members will request different versions of the same book through Wish Lists, etc.
• But duplicate ISBNs cannot coexist on your account Bookshelf.
• You may post one copy at a time
• Once you have mailed the first copy (and marked it mailed) you can post another copy.
• This rule is in place to give all members a chance at getting their copies requested.

Thanks, I figured that was probably what it was, but I just wanted to make sure.

That may be the reason, but....  I remember once having two copies of the book with the same ISBN. When the first copy was requested I was able to post the second copy, as the first was no longer on my Bookshelf.