I will almost guarantee that you have 2 lines so it’s cutting the entire thing twice. When you trace in Inkscape you need to either switch the default option to centerline trace (so it only traces a single line) or after you trace you need to break it apart and then remove the duplicate (because it traces both the inside and the outside of every line)
There are a few tutorials on that on here if you search for double lines - this one is video: