[Safasml]

Hi,
I am creating a blade geometry in DesignModeler. I have 5 sections and I wanna connect these section profiles using skin/loft. When I use skin/loft and select the surfaces of sections as selected profiles, the DesignModeler connects the lower edges of three sections to the upper edges of two other sections (please look at the fig attached).
And when I choose the lower edges as selected profile, it’s ok, but a warning appears:
Warning: Open profiles should be used with As Thin/Surface = Yes
Context: Skin/Loft Feature Skin1
Is it ok? What should I do? What’s the problem with connecting the surfaces?