Single and Double clicks

There are parts of the system that when it is double clicked it goes nowhere, but if it is single clicked it will go where it needs to. WHY? single click vs many clicks, the first click indicates to move to the next screen but it does nothing instead when it is more then one click. IE. Tables> patient intake > Scheduling tables and resources. Apparently anything that is hovered over and lights up green only accepts a single click and if clicked double goes nowhere. (Please move to the correct category).