intake valve closeing shim not coming off

[Pinion]

adjusting valves today, why not, heads are off. intake shims on both heads wont come off. was going to replace valce guid seal and clean area.
let alone 3 out of 4 valves in tolerance, 1 at .002 

[Speeddog]

Opener shims sometimes will walk around, and leave a burr on the valve just below the tip.
Then the closer hangs up when it's almost to the end of the valve.
Remove with a bit of fine sandpaper.

[Pinion]

did that, thanks for the info. Just wanted to make sure it wasnt a sign of other not so simple or good things