Hi Corzair - you can have any number of profiles.

But I think I see your problem - you're doing a one rail sweep with a bendy rail off to the side. This isn't good for 1-rail sweep because one-rail sweep will rotate the shapes as they move along the rail. This is why you're getting some strange results - there is a combination of rotation along the rail along with morphing between the profiles.

Although you can sometimes use a one-rail sweep with the rail off to the side, it might be clearer to think of it as a "spine" curve that should be running through the centers of the profiles. When you have your spine off-center, then any wiggles in the spine generate wider rotations to stuff that is way off of the side.

I will post some images shortly to clear this up some more.

- Michael