Project area templates management principles in RTC

Hello!

I think the answer to this question can be useful to many people to correctly understand how project area template management works in RTC.

There's some confusing moment when working with templates for project areas in Rational Team Concert (v4.0.1). Supposed, I create a new project area based on a project area custom template. After that, I make enhancements into the initial template but these enhancements are absent in the related project area. As I can see, the project area holds a copy of the initial template.
OK, no problem. Then I go from another side. I try to export the new template and replace the initial one by new one - I can not do it (because the initial template is linked to an existing project area). I try to remove the initial template - I can not do it too.

And the confusion is in next. Why the project area relates to the initial template although the process definitions in the project area and initial template are different at all? I think it brings some chaos in the process templates management saving the references form project areas to unnecessary and old project area templates with outdated data!

Thank you in advance for help and explanations!