Here are the first two FAQs:
Why do I see books on my book river that my library doesn't own?This happens when titles recently added to the system don't have items on them - that is, no one owns the title yet. Occasionally we will be cataloging a book, but for some reason can't add an item record to it right at the moment. We might have added the title for a school and they haven't had a chance to add their item, or some Mackin records came in with duplicate barcodes that haven't been fixed yet. We make an effort in Jeffcat to always add a 'dummy' Jeffcat item to titles that aren't yet held by any school, but sometimes we miss one. If you notice this, please contact us with the offending title, and we'll add a dummy item to the record so you won't see it on your book river anymore.
And FYI, it takes an hour or so for the PAC to update after we've made a change in the Cataloging module, so you won't see any changes we make right away.