Help with behavior of TreeList and a potential bug with it

My team has recently begun using a TreeList for a navigation menu, but given how new it is, we're having trouble finding many questions in the forums here (or with Sencha). We'd like to reset the TreeList to it's initial state (collapsed to the first level with no nodes selected) after a leaf is clicked or the menu becomes hidden. I'd just like to know how to collapse back to the first level with no active selections. I tried using some of the javascript methods we've done in the past, but it appears that what we've done before doesn't work with the TreeList.

Potential bug (occurs in the TreeList example as well): If you hover over the text of the top node (entering from the panel header... above the node), it doesn't hottrack until you hover over another node or another section of the node (like the expander, for example)... then it begins working as expected.