Aha, I figured that was the issue. ..
Your Idle state should link to your Use Action state. The Use Action state should link to a new state that has a Bool Test action to check whether the door is already open or closed (you will have to create a bool variable, e.g., is_door_closed?. If the door is closed by default, set this to true)...
If the door is closed, send an event to your Opening state. This state should have a Set Bool Value action to set is_door_closed? to false. If the door is open, send an event to your Closing state. This state should also set is_door_closed?, but to true...
Both door_done events should link back to the Idle state. This will allow the player to open/close the door only when inside the trigger...
I think this should work fine, but you must take a look at the PlayMaker youtube videos. They teach you the basics of everything and a lot more. I definitely benefited from them...
Game Design with Playmaker and Unity
https://www.youtube.com/playlist?list=PLC759306A1E692A10