I'm using SketchUp 8.0.15158.
My sketch has weird regions/lines in it that I can't explain or get rid of. I've redrawn almost the whole thing and the lines persist! See here, highlighted in yellow:
These dotted lines only show up when I triple-click the back face to select the whole object. Here's what the sketch looks like without selections:
What are these lines and how can I get rid of them? They are causing weird issues that I can't seem to get around.