Do you mean that you stop reading and when you pick up the same device again it's not where you left off? That is, I would say, non standard behavior. . . but I don't do much with PDFs, honestly.
OR, do you mean that you stop reading and want to pick it up on a different device and it's not where you left off? THAT, on the other hand, IS normal behavior. Amazon's syncing won't work with PDF files. It will only work with non Amazon purchases if they're sent/converted and archived at Amazon.
OR, do you mean that you stop reading and want to pick it up on a different device and it's not where you left off? THAT, on the other hand, IS normal behavior. Amazon's syncing won't work with PDF files. It will only work with non Amazon purchases if they're sent/converted and archived at Amazon.