Intersection between two surfaces not continuous

I'm working on a project that involves creating two surfaces from a defined set of points ( I also have the normals of every point).

I create both surfaces using the AddBsplineSurface function but since Bsplines don't interpolate the points exactly the transition of the two surfaces isn't continuous(they don't have the same tangent / first derivative doesn't match at the common surface border). Even though the resulting "edge" is minimal it results in a singularity when doing a FE Simulation. I am using healshapes to "glue" the two surfaces.

Is there a function to adjust the tangents? Thanks