This is a limitation to using Dreamweaver templates.
when using a template, you have 2 options?
1) all of your behaviors are added to the template.
1) You add the behaviors to individual pages that are based on the template,
you cant do it both ways, some behaviors on the template, and some behaviors on the individual pages.
obviously adding the behaviors to the individual pages is better.
what is it you are trying on the template that you need to add the behaviors to the template?