It seems that many asteroids & about one meteor in 7 is a double — as in a pair of co-rotating bodies, rather than one.
simply passing very near one of the inner planets can cause a rubbly asteroid to spin up until it flies apart. Its remnants can later recombine into multiple objects
That would explain doubled asteroids, but doubled meteorites wouldn’t have time to achieve this separation, they’d hit as a kind of big spludge.
The universe is almost always stranger than you expect. (-: