Civil 3D bug : Modifying sections views offset sampling & minimum elevation

Say i have some cross section views.
There are some cases that i must do the following actions for the Civil 3D section views to match section views made by another design package.
First change the minimum section view elevation.
Next change the section view offsets.
I watch that surface maximum offset values are updated as reported at the section properties.
But graph is not informed and offsets remain !

Sample line group properties, Sections, Sample more sources, Remove, OK and then Add again does not work.
Also closing and reopening the drawing does not work.

Workaround is to swap the actions order. First fix the offsets and next fix the minimum elevation.

For any already existing wrong graphs the only way to show all is to manual or by custom software set for each one cross section view the SectionViewProperties, Elevations, User specified, Maximum value to the value of the Automatic one.

Civil 3D 2017 custom programme, Section views Elevation Minimum set on the fly

Elevation minimum of selected section views can be changed on the fly with this custom programme-plug in, for Civil 3D 2017.

First download the plug in...
https://www.dropbox.com/s/bhpgymcp4herkdq/C3D2017_SectionViewElevMin.dll?dl=0
and save it anywhere you want

Then when in autocad at command line enter NETLOAD and select C3D2017_SectionViewElevMin.dll

At the command line enter setHRZ
enter the new horizon (minimum elevation)
select the desired section views

Finally right click on a section view line and select Update Section View Layout