Help with a twin screw geomtry

     Hello i am having some issues with this geometry, i will attach some pictures plus the actual geometry, the geometry has to be form by 2 screws, but in some point i think that they become just one solid (i do not know what point) so my questions are:

     -How do i know if they are 2 differente solids and not just 1 (even when they are just 1 part)

     -There is a way to know in wich point is this happening, in case that it is happening?

The first picture shows that the mid section view it is fine, but somehow the second picture shows that the geometry it is not fine at all. Plus the geometry it is attached too.

SolidworksParts And Features