I don't quite understand why this extra shimming between the blade and liner is necessary.
There are Teflon washer on each side of the blade that are enough of a spacer to the liners. If you tighten up the pivot to the point where the blade is centered and it happens to be too tight, well then, it needs to be broken in with some action and several hundred openings and closings. It WILL wear in and become smoother.
I've purchased many second hand Emersons that were in as new condition where the sellers most always had the pivot screw loose to the point the blade was almost touching the liner when closed just to have a smooth action. That's not right.
The only solution is to tighten up the pivot screw to attain a centered blade and work it. After several hundred openings, take it apart, clean it and very lightly lube the pivot and washers on all four sides.
Aside from this, which I doubt, the blade is bent and should be returned for replacement. Additional shims are not necessary.