Ohh boy, this is new to me. Just you so far. What slicer are you using? If you could, maybe email me this STL file to nate@mountmaker.net and I'll take a closer look at it. Is this issue happening everytime you export? Thanks for showing this to me, I'll do what I can to remedy the issue.
Edit: also, could you possibly screenshot or tell me what settings you had used for this? It will help me figure out which rabbit hole to go down.