It looks like the Frictionless Support is on the same surface that the Nodal Displacements are on. That is why just the individual nodes poke up, the surrounding nodes are prevented from doing so by the Frictionless support.

It looks like this is a slab of terrain, hundreds of kilometers long. So the surface is not flat. I have only ever used Frictionless Support on Flat or Cylindrical geometric surfaces. I don't know how it behaves on NURBs surfaces.

Please explain what you are trying to model and why you are using a Frictionless support.