That sounds very strange. The words aren’t M’akev in this situation anyway because they are clearly Asukin B’oso Ha’inyan.
Also, in your second case, the Kiddushin is completely Kosher. The Kesubah is just Passul so you would need to re-write a second Kesubah. There’s no reason at all to redo the Kiddushin. The Kesubah is not M’akev the Kiddushin in the slightest.
I do not know if any problems can arise from pointlessly redoing the Kiddushin, but in both cases it was unnecessary.