Regarding manage pages on theme level

Hi Telligent Team,

We're using two themes on our site. I've created multiples pages in the first theme but whenever I'm changing the theme it is redirected me to the "Page not found" page. 

When I checked in the Manage pages of the second theme there are no such pages.

Is this the default behaviour of the theme? Are the pages created for the theme-based only?

Thanks,

Rahul Jetli