@Marcus.Isacsson
The IVIB-BEF_(Existing) Wall Style instance (no fill) is in the None Load-bearing_(Existing) Wall Cleanup Group. The Innervägg Ny Ombyggnad Wall Style instances (gray fill) are in the Icke bärande Wall Cleanup Group. There will not be any Wall Cleanup between the IVIB-Bef_(Existing) Wall and the other Walls because of this.
The IVIB-Bef_(Existing) Wall Style has one component, with a priority of 700; the Innervägg Ny Ombyggnad Wall Style has one component, with a priority of 1. The Innervägg Ny Ombyggnad Walls will take precedence over the IVIB-Bef_(Existing) Wall due to the lower priority. To avoid having the IVIB-Bef_(Existing) Wall cut by the other Walls, you will need to arrange the Wall Justifications so that the Innervägg Ny Ombyggnad Walls are not pulled over the IVIB-Bef_(Existing) Wall. Two possibilities for the Walls in your file are shown below (and in the attached, modified file).
Or, you can adjust the endpoints of the Walls, such that Walls of different styles do not overlap. (Sometimes that is necessary even when adjusting the Wall Justification lines, as seen in the image immediately above.)
David Koch
AutoCAD Architecture and Revit User
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