When I Dimension to the Center of Wall it Dimension's to the Edge. I have the option's set to Center of Interior Walls.
Check your wall definitions. Dimension and extension settings within the wall definition override global settings.
Bill is the owner and maintainer of SoftPlanTuts.com
Everything is set to None.
In 2016 I didn't have this problem, same walls in 2018 as 2016
Looking at the example drawing you provided it appears that the problem lies with the walls that have the bracing. Since these walls are not symmetrical SoftPlan considers them to be an exterior wall. For these walls you will need to specify in the wall definition that the dimensions and extensions are to be at the center of the stud.
I changed the walls to the ones with the bracing, I guess that's why I didn't even think it acted like a exterior wall. I guess I'll have to create a custom formula to calculate the bracing material, some of the framers like it to the edge of the wall.
Thanks Bill, you solved another mystery