So there's definitely a problem somewhere ... the pressure plate should have plenty of pressure to pull the pedal back close to the top. The overtop spring's purpose is mainly to assist when depressing the clutch with a B&B style pressure plate - it will also snap the pedal to its stop as long as there's no binding anywhere.

Possibly the wrong clutch rod (pedal to z-bar) - too short.

email me your pics and I'll resize and post them.
stanton_giles@hotmail.com