AS you say, it's already too much complicated.
It's not at all the easy fix at the surface.
I looked thru the set of formula, but from my analysis, whole the workbook needs to be re-build from the scratch to achieve it.
The problem looks complicated,
but scratching further down, it seems that
you'd like to simply sum up each column
from the worksheets below the totals.
It could be done by putting [comname] on Details
and using a tried-and-true Nested Table Calculation
with an in-calc filter IF FIRST()==0 THEN ... END
(courtesy of Richard Leeke).
Please find the attached.
Coverage - Eks_YF.twbx 466.0 KB