Jarrett

The SVG file does show the doubled curves but without the Designer file which you used to export the SVG there isn't a lot of help I can give you. You may have in fact somehow duplicated all the objects in the Designer file. Check your Layers panel is about all I can say.

@JarrettI was doing a project and what I had to have was one path for the entire drawing.  Basically as if you couldn't shut off the laser during a move.  I made a preset for exporting SVG that solved many of my problems.  I don't know if it will help you but you start with the More button at the bottom of the SVG export.  Maybe some of the other options will help you.

@Jarrett, I've never used the Glowforge laser, but when I've done designs for my Shapeoko CNC router, I always try to have just one path for each cut.  I have never found any automated way of doing this.  Have you checked on the internet to see if there are any optimization sites to do this?  I never searched for such, but it's an idea.
The few times I've tried to use a program converting jpg to a vector, like Vectorize I found that the vectors were not very clean and were confusing.  They required a lot of manual work to clean up.  Redrawing it was usually easier once I figured out what my machine needed. 
I'm assuming the laser can shut itself off to move from one point to another without cutting.  Which makes the redrawing fairly easy, usually.  But then it does depend on how complex your design is.

On Windows, does not work with your example, but works with new objects.