On a side note, the most bizarre thing is that the tailpiece studs are NOT the same. IOW they are threaded differently and don't even look the same. How weird is that?
One (or both) of them is non-original.
I would guess that there is more that is non-original than just that, though, because Heritage doesn't make that kind of mistake. You might look into getting them replaced with something better (I'd go with a Tone-Pros rig - they are very fine). Otherwise, take your guitar to a good tech, and they should be able to sort things out, but it's not that big of a deal if the strings touch the back of the bridge. It might lead to a slight increase in string breakage, but not always.