Hey I’m away from my computer so I can’t be a ton of help but I’ll say two things.
One: welcome! We love new people here 
Two: if you’re having a problem with a particular file it can be really helpful if you can upload it here. There are a few reasons why double cutting might be happening, if you let us see which svg it is we can probably help you troubleshoot it.
And hey why not a bonus three — if you haven’t seen it I think you might like this post, full of good stuff to know: