Select all other units (bug?)

I noticed this since they changed the options in the menu around in the last patch - when you have all units selected and you tab to "select all other units" - your hero doesn't get deselected, it selects all other units within your selected group. So if you click or do whatever all your units move to where you clicked. Cost me a few deaths while playing visage :/

I may have failed to tick/untick an option so wondering if anyone here has the same thing?