After deleting my library [900+books] and re-loading, the page numbers are not working again.
I deleted them as per above post, changed the setting for custom column to unchecked [blank]. So the only setting I had changed initially was 'send page numbers' from 'fast' to 'accurate'.
It doesn't make sense that it worked on 2 books, but not when I changed the whole library. Maybe too many at a time? [this is what it did before I posted, I had it working on 3 books, but when I re-did the whole library it wouldn't show pages again].
Suggestions?