Please note that the red in the 3D model indicates that you have modeled to height greater than the stock thickness:
You have 4 vectors associated with the 3D toolpaths — I believe you only want one:
A further consideration is that you are using a tiny tool — I’d suggest a #102 at the smallest for roughing, and note that if you go down to the tools which have short cutting flutes and shanks wider than the cutting diameter it is on you to make certain that you aren’t cutting up against vertical (or nearly so) features which are taller than the cutting flutes.
See:
If the 3D model isn’t what you want see: