On the deployment screen, you can double-click a ship to select all of the same type. However, GSB interprets any click on a ship within X time since the last click as a double click on the ship, even if the previous click was not, in fact, on the clicked ship. That means that if I want to check the orders for several ships of the same type, and click on them rapidly on after another, the game interprets this as double-clicking on one of the ships, even though I never click on a single ship more than once.
This will be fixed in version 1.07