offsides

Correct Call: Offsides. 30 second technical foul. More than 7 defensive players on the field.
For this to not be a penalty: The defensive team can only have 7 players including the goalie.
Game Level:This should be called at all levels.

Too many men on defensive side

Correct Call: Too many men on the defensive side of the field for the defensive team. Illegal Procedure, 30 seconds technical foul. Slow whistle.
Game Level:This should be called at all levels.

Over and Back, maybe offsides

/ Offsides, Over and Backs
Correct Call: Over and back. Turn over, quick whistle. It is possible the white defender stepped on the center line when the dark team had the ball. If yes, flag down for offsides.