Hi,
Sure, here's the situation i had explained (with some relevant background):
These bolts are placed in the assembly as a assembly, which is patterned. (so bolt, nut and rings are placed inside their own assembly). However i don't want the assembly of bolts to show in the BOM, i want the parts inside the assembly to show. i had made the bolt assembly a reference (in model tree, right click>BOM Structure>reference). When editing the 2D drawing i saw some parts were not showing in the list, so then i realized i had set that bolt assembly to the wrong BOM structure. i set them to normal again, opened the BOM in the assembly and changed the assembly to "phantom" which resolved the issue i had in the 2D view and made the missing items appear on the parts list.