Cannot assign multiple templates

All four of my Mobile Joomla templates are un-assigned, and no matter what I do, I can't assign more than one of them by selecting menu items to assign them to. I'm not understanding something basic about the way this plugin works. Can anyone help?

I uninstalled and reinstalled Mobile Joomla, now all four mobile templates are "Assigned". However, according to iphonetester.com, the site being displayed is exactly the same as my main site, and the site times out on my Blackberry, so I can't see anything at all there.

OK, I can now see the site on the Blackberry. not sure what was up with that. Thanks for all your help, everyone!

iphonetester.com is not an emulator, it always show desktop version.

Gotcha. I've downloaded the Android SDK and emulator now.