..."but I cut off the bottom 3-6" of the core and only send the upper "surface to 3 inch depth" as a separate sample. I don't tell anyone, not even the lab. Done this multiple times and results for here are if standard 0 to 6 test says 25 ppm of P, 180 ppm of K the strat test is mostly 50% higher. So it will say something like upper 30's ppm P, mid 200's ppm K. So we have stratification."

If that is what you call Stratification, then I say Stratification is normal.  In fact, this article says just that.   It also says that no-till crops - where "stratification tends to happen more often - will compensate by pulling nutrients from closer to the surface.  

The other point that I want to make.... if you pull a soil sample in the top 3", what about pulling a soil sample in the, say, 12-18"?  What will you find then?  ( I do believe I know the answer.) I do believe crop roots grow down in the 12-18" zone?  Should you be concerned about the fertility levels in that zone?