Loft with guide curve strange result

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1

Loft Experiment 2.shapr (217.2 KB)
I am having an issue with the loft from the main body to the front cap. Only half the loft is following the guide curve. Can anyone explain this and possibly provide me with a solution.

2

Your cross sections should fit this puncture points:

IMG_1642
IMG_16422732×2048 668 KB

At first, draw to this purple points a line , in that case you got the real points where should fit the cross section.
IMG_1643
IMG_16432732×2048 897 KB

3

This is how I set up the guide lines. But on the top arc I still only get the arc surface on half the loft on the front cap. If you open body 4 you can see what I am referring to.