That would be a link to a picture of the file, not the file. A link to the actual file would be more valuable in figuring it out, but as you purchased it, I guess that is questionable.
What I see time to time across some applications is that if the svg file has for units anything other than pixles, (px,) then the application mangles dimensions. I don't know if this is the case here. Maybe from Illustrator or Inkscape you can set the documents units to pixels then save and try in Graphtec.
In the raw svg file you would see something like
width="8in"
height="2in"
If you get it set right that would be at 96dpi
width="768px"
height="192px"