ZIP flew to Xeen, but they had to leave orbit. When they meet A-Khorak on Beta 5, they say "we saw you crash on Xeen"; if the world they came from before reaching Khorak were Xeen, they wouldn't speak of it as a separate place from the world they left to get to Beta 5. So where is the proof that this world is actually Xeen?

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Furthermore, why would Varna from the first part colonize Xeen, and where could any kind of Varna even come from on Xeen? It has already been colonized for a long time anyway.

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I also replied in that thread.