When units are selected, you can change your selection using the left and right click. You do this by left or right clicking on the unit selection icon in the bottom left corner of the screen. If you have multiple unit types selected, left clicking will only select that particular unit type. Right clicking will remove that particular unit type from the current selection. The problem is that left/right clicking on unit selection icons only works as intended if those units are on-screen. I.e. if you have 6 air factories, 5 bot factories and 3 vehicle factories selected, you move your screen so that those factories are no longer on screen, and right or left click, nothing happens. If you have 100 bot fabbers and 100 vehicle fabbers selected, if you right click on bot fabbers it only deselects the fabbers that are on-screen.
Why? It's not hard. Main reason why I'm ask people open tasks on their own because for 100 players it's easier to track 1-3 bugs each while I can mess up with them, forgot about them and so on.
