Surface split

Hi at all, i divided a surface with a brep section and then the sames curve sholud be used to form the smaller surfaces to paneling the main surface. Well until here there's no problem but when i connect this curves to a surface split the results are a lot of surfaces, trimmed and untrimmed, that are not the results i hoped. While if i bake the curves from the brep and the i select these from rhino the split surface work wonderfully.

Do you know how to oblige gh to work fine?