Speed density calculator issues?

So I have been trying to use the SD calculator on VMC Editor to tune individual SD mapped points on my 15 mustang. I am consistently getting inaccurate calculations after adjusting data. It sometimes 0's out columns and other times it just completely doesn't follow the regression curve that was adjusted to. I believe I am using good practices; using 10+ hits, averaging my MAP sensor over 100 milliseconds to avoid erratic data, I am extrapolating the data to fill out complete columns, filtering out inaccurate data, and smoothing the data before calculations. Still I get calculations that are more inaccurate then before, and it doesn't resemble the data that was presented pre-calculations.

I have successfully SD tuned in the past with some of these issues but i was able to make it work out in the end. Im not getting any functional results anymore. Here are some pics of what im talking about.

Original SD Table
Attachment 135880

3D VE
Attachment 135881

Adjusted, extrapolated and smoothed.
Attachment 135886

3D VE pre calculated
Attachment 135885

Calculated best of many tries
Attachment 135883

3D VE
Attachment 135882

A fairly regular calculated VE
Attachment 135884


What am I doing to not be successful? Are others having this issue?