Problem about Surface Split Component

Hello guys,

I set result of Surface Split to be the input of python program. But something strange happened..

In this program, I just set output=input.

You can see the input have a lot of Trimmed Surfaces. But the output changes to untrimmed surface . When I bake this result, it become 3 same surfaces of each branch.

When I bake one of those surface, and read the control points, it displays original surface information.

Why does that happen? How can I solve this?

I would appreciate if someone could lead me into the right direction.

Thank you for any assistance!!!!!