I imported you SAT file into Revit manually (without Dynamo) and got the same result.
I also imported your solid into AutoCAD to take a look at it. The solid does not look very clean. You have some surfaces with edge imprints in the middle of the surface, and also coplanar surfaces that really should be one surface. I would clean up the model first before trying to import it into Revit, since Revit is really picky and expects very clean models. This is because Revit creates automatic constraints when importing geometry, so anything that is not clean is discarded so that the parametric constraint engine does not become unstable.
Here is what I saw in AutoCAD: