Dwells – Unique dwellings for creatures on the map, levels 4-7.

Hmm, if I understand the mod correctly, it adds new objects to the game, which are essentially creature outposts. That is, they look like dwellings of a certain level, but in reality, they are outposts of levels 4-7, so their guards are also a combination of different creatures.
On a specific map, you can use scripts to fix this: disable the standard event handler and enable your own trigger, which involves a battle with the required number of creatures, then assign the object to the desired player as its owner, enable it, and finally, trigger an interaction to open the hiring window.