[Barrie Brailsford]

Your pictures aren't really conveying enough information about what is occurring. I just see one page that is partically scrolled, then another page. So it sounds like you are using full page turns with your pedal, or something along those lines. You may want to instead use a pedal action to scroll the page (use Scroll Down or Turn Page if at Bottom with the % set to 50 or something along those lines).

Mike

Perhaps also ensure that the 'scroll amount' is set to :

x% of screen

Rather than 

X% of page