Please read the bug posting sticky in the top of this forum.
That's how it should work. Open outlook, click on a row. Click again. Open explorer. Switch to details view. Click. Click again. This is the standard behavior in the majority of applications I have ever used. If you want it to behave different, it's not hard to do but that doesn't make it a bug.
Jack Slocum
Ext JS Founder
Original author of Ext JS 1, 2 & 3.
Twitter: @jackslocum jack@extjs.com