Hi. So the story has it that when Vahlok fought Miraak and before the killing blow, Herma-Mora took him to Apocrytha. Then how is Vahlok Miraak's jailor? Miraak escaped. What good is a jailer for an escaped "criminal"?

Then they locked Vahlok up in his tomb. What good does that do? At first I thought Miraak's remains were in Vahlok's tomb where Vahlok's dragon priest form was guarding him. But then I found out Miraak is chilling in Apocrytha.

And lastly, if Vahlok is so 1337, why didn't he come back from his tomb when the Solstheim crisis started, go to Apocrytha, and kill Miraak?

Miraak never reappeared on Solstheim, therefore Vahlok didnt care.

If Miraak managed to enter Tamriel again, then Vahlok would try to stop him.