None of the bombs' rotating orbs hit the regular Jelly Minis. The initial blast does deal damage, but the orbs don't. The orbs also DO hit the Green Jelly Minis, so I don't think it's intentional that the regular ones aren't being hit.
I sent an in-game bug report, but just posting this here for good measure :3
Other than the Dark Reprisal's orbs going through them with no damage, those little jellies seem to stop Brandishes, Sealed Swords (4*+) and Antiguas' charge last bullet that normally goes through enemies (again 4*+).
Actually they act like little moving walls.