1-The rage head is meant to be shot while it is closed, not open. They will NOT fly correctly if they open.
2-You have to make 100% sure that when you close the blades you feel them "click" in over the rubber o-ring. If you don't feel it "click" than rotate the o-ring or replace it. You can also modify the back portion of the blade by fileing it down some to get it to fit better over the rubber o-ring. You can also put the ruber band over the top like others have posted.