Thing about profile is, a lot of their stuff seems to break. They don't have very high tolerances. Chris king do, I think, but it's a much more sensitive mechanism. My mate said this about profile, that their stuff is designed for BMX racing, and only to last a single season, after which it will be replaced.
Jump bike - low BB, short CS, sharper HA (i think) so it can take higher forks, shorter in general. Trials bike - raised BB, around 30, longer CS, 380 or so, slacker HA to take lower forks, longer - 1030 or so.
Are you undoing them much? If you just loosen them off a little bit the chain tugs will stay in the dropouts whilst you're using them. If that's not it, I'm fresh out of ideas.