Sweep1 twisting

Hi everybody,

I have a problem with sweep1. I really don’t understand, why surfaces are twisting, when I use sweep1. Can you help to solve problem and explain shortly, how I should think in such kind of problems. In traditional CAD programs, you should only play with surface arrows. Appearently, it is more complex in gh.
twisting.gh (167.2 KB)

You can look my file, Not perfect but i have change start points curves.
twisting2.gh (180.7 KB)

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another way to align the seams:

twisting_Re.gh (176.9 KB)