It worked for me with Guest role via ...
Also, you should enable ' Adds Suffix to URL' in SEO Settings via Global Configuration.
I can switch between page 1 and page 2 without problem via link that you gave me...
I'm using Firefox at latest version.
I've reviewed your problem, I think you have use more extension for SEO such as SH404 or Arito, right? So, please try to disbale it and recheck, because we tested problem in default joomla and our template but it still works fine.