Hey Will,

Instead of moving pages around - you are better to install a copy of the Lists module on a new page.
And not move a page from the Hosts menu - you can sometimes get some odd things happening if you do this.

To get access to the Lists module - go to your portal settings page - at bottom of page expand Host settings section 
and move the Lists module across to the available side of premium modules list.

The Lists module will now show in your module list - oh just remember to remove it as a rule once you add it to  the pages you need.

As for moving the page back to the hosts menu - hmm thats a bit more messy - easiest way would be to delete old page and add a new page.

Westa

You cant move the instance of the module back onto a Host page easily - however - there is no real need to - just add the module back onto the page in the hosting menu.

See the steps above.

Westa