Does the one that made it show up on the product page and not the others?
If so, you're okay.
I don't think you can access the book when it is processing.I haven't uploaded recently.
Check back from time to time. If either or both of them stop processing, you can deltet them.
What counts is what the customer sees.
I don't know why the two are processing. There was a glitch and maby that's it.