Loop Cuts adding extra lines to make triangles.

My loop cuts, on two different projects now, are adding extra unnecessary lines at angles, creating triangles.

All my faces are 4 sided.

Anyone know why?

I can then go in and delete those edges and then I get exactly what I want. So the extra geometry wasn’t even necessary. So why was it automatically added in the first place?

In fact, the purple line is only on two faces of the four I am trying to add the line around. Once I LMB, though, is when the funky angles appear.


Remove doubles and inside plane where arm starts.

Happy blending!

where the arm starts remove the face in there and remove the doubles after words and have fun blendering