I suppose, but it's not like the HoW is without a leader. The fallen in the house are under the rule of the queen, and they're very loyal, so I doubt they would just up and leave just because another kell was found.
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I believe it is because some of the Fallen managed to escape with a Kaliks, then they grew in numbers and the Kell was chosen. While some joined the Queen and named her their Kell. House of Wolves is, or might be divided in two.