I'm starting to use jQuery Mobile, and there's a behaviour that causes me a lot of doubts, mainly related to using IDs for elements.

My page has a menu to the left (a panel, with a unique ID like the docs say), and then header/content/etc, all inside a "page" div.

When I navigate to a different page, jQuery keeps the "original" page div that was loaded first with the page, in the DOM. If I keep navigating, other pages loaded in the DOM do go away, it always keeps the "active" page, and the "original" one.

* Why does it keep the original loaded?
* Can I avoid this? (for cache-breaking purposes)
* Doesn't this make my ID's (particularly the one for my menup) non-unique which tends to be frowned upon?

Thanks!  

Daniel