It might (I stress might – have no source for this) be why it says bas ploni, liploni . Of course, this explanation has many holes, not the least of it is that it doesn’t explain how it works when bas ploni is older than ploni.
Then again, I don’t understand how krias yam suf worked either, and hashem had no problems pulling that off, so I figure do your hishtadlus and live with tamim tihyeh I’m hashem elokecha.