So I get this issue when I select the exterior walls from something like my first floor plan and then I copy to the SoftPlan Clipboard and Paste into a new drawing. In this particular example I then changed the wall type from a 2x4 stud wall to my 8 inch block wall. Then I click on Auto Dimension and they are sometimes dimensions to the outside and sometimes inside and sometimes walls get dimensions and then the extension lines are longer than usual. Clean Up does not solve this issue. But saving the file and then creating a new file and merging the previous in does fix the problem. Not sure if anyone else has seen this or can repeat this.