The pages you referenced are not duplicates. They have the same layout as each other, but different content.
The only possible problem I can see is that, if you use the Next button to go from page 1 to page 2, the URL of page 2 is different than if you go there direct. That's not ideal, but I can't see how that could do you any harm. In any case, you are correctly using rel="canonical" to resolve that issue.
I don't particularly like the "slider" effect that you get when you click the Next button. It's unnecessary and distracting. But that's just my personal opinion, and does not affect the content in any way.
Have I answered your question? If not, perhaps you could explain why you think you have a problem.