There seems to be a clash in the set up in GoT-MoD and Dance of Dragons cards. Player Tyrell and Vassal Baratheon both have starting positions in Shipbreaker Bay. How to solve that? Any ideas?

MoD is not compatible with the custom setup from DwD.

The rule-book simply says that you can use an alternate house card deck (DwD + Arryn FFC + Targ deck B) to mix things up. You still use all the other MoD rules (including setup).

Ok, that makes sense of course. Thanks!