There is a bug in the way the current version of Fritzing handles Gerber exports of boards with cutouts. It is fixed in the development version of the code, but you would need to build that from sources to use it (there is no download available). For some details, and possible work arounds, see this forum post.
The Summary is that relative closed shapes in an svg path element are not being handled properly, but the same path with absolutely positioned cutouts works fine. Inkscape uses a mix of absolute and relative positioning, and I do not know of any way to force it to use absolute only. My ‘fixes’ for that part (in the other post) were done outside of Inkscape. Related bug reports:
Gerber export missing and moving some custom pcb cutouts
gerber export does not include final segment of shape created by “z” command in svg path element
I’ll have a look at the svg you posted, to see about fixing it up. I see a lot of digits of precision in the size and coordinates. I may not be able to maintain that, but I doubt you really need things to be accurate to 10e-6 mm.