Ah.
Well, in which case, I blame the loctite you put on it - it is supposed to add resistance to threads turning, and may make it hard to tighten adequately!
Disassemble the whole thing, and put carbon installation paste around the whole inner cylinder of the saddle clamp assembly.
Remove the loctite from the threads of the bolt. Replace with honest, old-fashioned grease.
Torque to spec.
Live happily ever after.