Hey guys, I wanted to step in and clarify a few things. To utilize dashed in SketchUp 2019, you need to use the 2019 drawing set. Also, ConDoc will always switch the Layer0 line type from default to dashed, unless you force it to some other dash type. This is normal behavior. Dashes are then disabled by the ConDoc styles. Strange approach, but it was the only way to utilize the new vector dashes. So to sum up this point, best to leave the layer line type alone and let ConDoc handle it.
Regarding the elevations, there is in fact a stacked viewport that has only the floors showing in dashed line style. If you prefer to not see the floors dashed in this way, you could simply delete the dashed viewport out of the elevation. Moving forward when you create elevations there won’t be any dashes. Keep in mind that if you want to have some dashed, you should just duplicate the elevation drawing and name it “no dashed lines”… or something like that.
Sounds like you were able to get the problem solved. Let me know if all this makes sense… Thanks!