I edited my previous comment as I wanted to check a few things out before giving incorrect information. I removed the part that said I was advised to use Inkscape 0.47 by a friend. I was told Sign Cut worked better with version0.47 and a new update was to be released to make Sign Cut compatible with...

I use Inkscape and Sign Cut and had the same problem. I was told to save as EPS in Inkscape, open Sign Cut and then open the saved file. It worked. I know you can import SVG but they did say EPS works better. I don't think the following would cause your current problem but there are a few things tha...