84 Comp Floor Questoin?

I have my Comp down to the stringers now . It was supposed to have had new stringers 7 years ago? I thought they screwed up the stringer height as it corresponds to the floor height at the sidewalls. They cut the original floor about 4 '' from the sides and butted up the new floor to it .So I still have the exact location for the original floor on the sides . I removed the fiberglass from the top of the main stringers and found they only sistered new stringers to the originals. Here is my problem my floor is lower at the sides then at the center where it attaches to the main stringer. I was going to make the floor straight from side wall to side wall but I will have to cut the stringer height down about 3/4'' to do that. It looks like the floor tapered down from the engine compartment to the sidewall.

Has anyone ever seen this on a comp?