Double line? I am seeing a thick line, but not a double line.
I see pretty much the same thing you are seeing (of course, this is a note and not a section title.
When I DO use a section title, I get this (with underline) LOL:
I got this by checking this:
But, if I leave underline unchecked and then just double click on the title and select underline that way:
Is it really a double line or is it a layer setting that thickens the lines and text a lot?