Yep. That's way too much pressure on the input shaft. How did you put it in there? Did you stab it as far as it would go then crank on the bellhousing bolts to pull the transmission in?

That tight of a bushing will spin the input shaft when the clutch should let it spin. You might as well have never hit the clutch.
Fix that and the problem should go away.

I'd hate to see what kind of thrust load you were putting on that input shaft bearing. It probably had everything stacked up tight in there.