Each combat encounter occupies one to four pages (four is rare; two is most common) depending on several factors including complexity and the length of the stat blocks involved. Some encounters just refuse to fit in two pages, and some encounters simply don't occupy two pages.
DMs familiar with the encounter presentation in Keep on the Shadowfell, Dragon Online, et al. should be able to find their way around the War of the Burning Sky encounter pages with ease.
Combat encounters are separated into their own appendix. So far, the story and other DM information tends to occupy about half the adventures' page count (the first half), with the combat encounters making up the other half. We've included page number references backward and forward, from story to encounter and vice versa, to make the thing as easy as possible to navigate (and the PDF is hyperlinked).
Adventure One got one update which fixes all the major issues we've identified. For Adventure Two, we haven't yet scheduled an updated release, but if you find a "show-stopper" therein, let us know and we'll get a fix out as soon as practicable. Adventure Three is scheduled for a minor update (it needs a battlemap replaced and some of those page numbers I mentioned) as soon as I can get around to it.