If you remove too many bristles the arrow with fall through the remaining ones, or if you put the slots in tht wrong spot, this will happen. The botton of the bisquit must have a good base of bristles to hold the arrow. New bisquits are cheap, so no big problem. Just do it again, and make sure not to remove as much. Of course, the bisquit works perfectly well, even if you don' t put any slots in it.