Hello,
Default behavior of click boxes is to trigger the simple action that is assigned to it AND at the same time to release the play head. Even if those 3 click boxes had a pause, at the same moment as the fourth, this would have happened. If you put the pausing point of the fourth click box later than the pausing of the first three, it will work fine if the user clicks only one out of 3 click boxes.
If you replace the simple action by a (eventually one-line) advanced standard action, the play head is not released:
http://blog.lilybiri.com/why-choose-standard-over-simple-action
http://www.youtube.com/watch?v=M3nKi-DB6Fw
Lilybiri
