Annoying language injection editor behaviour - WebStorm

I recently started using WebStorm so apologies if I'm missing something obvious. I've come across some annoying behaviuor and wondering if it's a bug or feature.

I'm writing a jQuery plugin at the moment using the language injection editor to edit a HTML code fragment that will be inserted in to the DOM.

1. when I hit ctrl+z twice, after I make a mistake or otherwise change my mind, it closes the editor rather than undoing my changes.
2. Escape is supposed to close the language injection editor but it also dismisses code completion hints
3. When I open the language injection editor, focus isn't always transferred to the editor.

Can someone help? Am I missing something? Can these "features" be configured?

Cheers
Brian