I have several countersunk holes in a plate to descretely bolt components to.  When in the assembly, after applying all the mates, I attempt to use the Smart Fasteners tool to add the countersung screws and associated hardware.  The utility is able to find all the holes as well as the mated components (the screws pertrude through the plate & components), however when adding the associated hardware via the "Bottom Stack" property, the selected hardware is only added to one of the numerous screws.  It appears that this only is happening with countersunk screws.

Please advise.