From what you are describing the, if the models start in initial contact and do not have a gap before touching, then the Global No Penetration contact is probably not being recognized. You would want to go ahead and create explicit No Penetration Contact Sets for these pins and then re-run the study. If the objects are starting with initial contact you might expect that the displacement plot have a continuity of color.
If there is a gap though you might expect that the deformation show a penetration since one object has to move a greater distance to fill the gap. In that specific case only a True Scale deformation plot will show correctly.