Synchronising between Kobo devices

i have the Android Kobo app on my Android phone and a Kobo Touch. I currently have four books I'm reading on the touch but only two of these appear on the phone plus a different book. I sychronise the touch and refresh the Kobo for Android and expect some correlation between the two but it doesn't happen. The two common books when I open them on the phone start at the first page and not where I am in the book on the Touch; also the books on the phone haven't a full set of pages.

Am I correct in thinking that I should at least get the two books on the same page on both devices or what is the use of synchronising?

Thanks.

Brian