Just checked on 1.7.2 and that goes to 2 page view automatically once the window is wide enough. I can't find any explicity option to setting/unsetting it.
It may be that if you reduce all the 'furniture' around the page view as much as possible you will get 2.0 to give you double page ...???
There are lots of bugs in 2.0; it wasn't just the support they skimped on, but design, development and test as well.
I reverted to 1.7.2 because of bugs in 2.0 for Sony eReader, but lots of others have found it solved their issues.