Archive.org Book Issue

Hello.

Having read half of a book on Archive.org. I've tried to go back to a specific page where i stopped reading and i'm now getting page segments with the message, "Limited Prevew, some pages are omitted, use your free account to borrow this book and gain access to all pages." along with the odd readable pages. The only thing is. I'm logged into my account already.

Any suggestions?

Thanks