Wow! Thank You!
Also, when I try to just add holes onto a Fritzing rectangle, it will complete the lower left but not the lower right.
Untitled Sketch 3.fzz (34.9 KB)
Gerber Viewer shows the contour .gm1 as skewed for the custom imported board from Inkscape.
It should look like this…
You are doing better than I 
for me the contour layer is empty:
Fritzing pcb:
Gerbv output has no apparent contour layer (although the file is loaded):
In any case, it looks like you have hit one of the gerber output bugs and need to try and adjust the outline svg to make gerber output happier.
Peter
I have a few different brands for ZIF’s. I like these little Blue ones - they’re only a couple of dollars on Amazon and have lasted me several years… I don’t use my $30 ZIF’s anymore…
It’s only a graphic (in KiCad) for the 3D-View. The footprint for the actual PCB is below…
Blue ZIF Shown on my Arduino hobby Breadboard…
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