The OEM pipe connecting to the mufflers ARE "pinched", i.e., somewhat "flattened", where the axle/body intersect: that's "normal" and a designed-in feature of that portion of the exhaust system for purposes of clearance.
That having been said, it's probably a good idea to have the dealership look at it on the rack before you conclude that you have a problem/decide to change out the pipes on your own.
That having been said, it's probably a good idea to have the dealership look at it on the rack before you conclude that you have a problem/decide to change out the pipes on your own.