Hi Markus Berchtold,
There is an issue related to the behavior you have described. When you edit the content/layout of template, the content of the pages associated with this template gets hidded from the public site, but is still visible in the page editor. Could you please confirm if this is the issue you're experiencing?
All the best,
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items