gui-open-sound on succes

When you click on a team it selects the team but it plays the gui-open-sound aswell as the succes-sound It happens when the block in the inventory is being changed to the color of the team selected. And when clicking on the team your already in it gives the succes message again but in chat it says that the teams are not balanced; shouldnt it be the error-sound that will be played?

Example can be provided but the issues seems clear to me. just let me know.