Theme template pages are sometimes an annoyance because it does not look the way you want it to look like. Most of us do not use the default WordPress theme, we search online for free themes we can use. The drawback is that themes are coded and developed differently. This then goes to the limitations of your chosen theme, a widget area is missing, sidebar is different, and some features you need are missing too.
Here is an article discussing how WordPress works, what you need to know before hacking, and how you can hack WordPress theme templates and make it work your way: http://wphacks.com/how-to-hack-wordpress-theme-template-pages/