Watch Phil put the deck together in his video and you'll understand (18 min or so). Notice that he didn't use the paperclip and moved the pos bloc plate out of place--don't do that!
I see thanks for the post. I am wonder what exactly made it move. Can you make the weird nut very tight to prevent it from moving? That would suck that every time you want to change your airflow the deck moves. Terrible design. They should have had a simple to use air flow ring system or something.