Hi mrjynx, often times it's difficult to try and build a shape that goes through significant shape changes all in just one single loft.

But also in your case here the 2nd to last profile also kind of sticks out a ways more than the other ones, that will tend to make a kind of swoop in the shape like you're seeing.

Here's a view of your curves from the top to show the one that sticks out beyond the other shapes you're lofting with:


- Michael