Revu is skipping pages 3 or more at a time when I use PgUp / PgDn in documents with multiple page sizes. For example, I'm on page 8 of 18 of a document where pages 1-6 are lettersize and pages 7-18 are 24x36. If I hit PgUp to go to 7 of 18 I go to page 5 of 18 instead. I was zoomed out a bit. If I click One Full Page first then it will PgUp to 7 from 8. Why does it do this?