Bob & the Nevernever: Did Jim make another error, or drop a clue?

[Mira]

It's pretty clear that the skull-owner's "upon-leaving-skull" instructions are entirely binding:  almost dead, Harry managed to say that the conversation (with Evil Bob) was over, and that pre-defined end-state immediately forced EB back into the skull.

I agree that we haven't seen anything about what limits the skull itself might place upon Bob.

But -- hypothetically -- a fundamental set of orders to "seek or accept no other refuge from the Dawn" and "always return to the skull" would seem like some basic controls to have in place, alongside the basic "abide by the orders and restrictions placed by the owner of the skull, each time you're allowed out" framework.

Like old Dracula having to return to his coffin containing earth from his native land before the sun rises.

[Conspiracy Theorist]

Not clear what other protection from the Dawn existed, Ghosts can use their graves, I presume the Castle is a Sanctum (otherwise dawn attacks would make it vulnerable) but may have required activation from its owner, and is huge and immobile. If Bob can create an ectoplasmic body in the castle it has limitations, he can’t move outside of its protection without risking Dawnbreak, so he is still effectively limited to Chicago, he can’t pick his sanctum up and take it with him, which is what he wants.