Mobile menu - toplevel not shown whengoing to submenu

I've created a very simple menu for use with small screens.
One of the items have a subitem in the menu, but when I select that, the toplevel menu disappears, and there is no way back to the toplevel, how do I make it keep showing the toplevel?

The only possible reason is that you use Joomla!1.5 and set identical aliases to two (or more) menu items.

I cannot help but feel quite provoced by such a statement, and I can only reply to such a categoric statement with "apparently not".

This is J 2.5.6

This is the menu structure in use for the mobilesite (mobilemenu-structure), I've also tried renaming all aliases in the mobilemenu to globally unique names (no aliases on other menus that matches), with no change



I've attached some snapshots of the menu if I use the standard menu module, as you can see it keeps the toplevel, but the layout is not that good.
First I go to the startpage
Then I click on 'Om klubben' and the submenu appears
Then I click on 'Indmeldelse i klubben'





If I use the mobilemenu module, it shows the problem when clicking on a subitem, as shown below.
First I go to the startpage
Then I click on 'Om klubben' and the submenu appears
Then I click on 'Indmeldelse i klubben', and the toplevel disappears