Lpu sector entrance


I’have bought 2 lpu memberships just before the entrance to LPU members sector in front of stage in Rome today. But guyz from staff have said that there are no more yellow bracelets available. Is that normal??? I have entered as non lpu-member at the gates. Are bracelets quantity on every concert is so limited that after some period of time they are not available any more? Is there possibility to cancel my 2 lpu memberships??