Perhaps it works better if the clamp points the other way. Check how the seat tube and the clamp are lined up.
It may be a bit better when the slots are NOT lined up, but on the opposite side.
@Dutch_Cheese started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Perhaps it works better if the clamp points the other way.
Check how the seat tube and the clamp are lined up.
It may be a bit better when the slots are NOT lined up, but on the opposite side.