Kastas is right, as they stand your events read "Platform is moving: set 'Run' animation - Platform is moving: set 'Idle' animation". Maybe you missed this part of the tutorial on page 6:
o make the above event you'll also need to invert a condition (appearing as the red cross). Inverted conditions mean the opposite of what they state. In this case, the inverted "Platform is moving" condition then means "Platform is NOT moving". To invert a condition, add it normally, then right-click on it and select Invert. Alternatively, select it and press I.