I have TDD 1.03 and all Weimer mods (except Ritual) installed in that order on a clean, patched ToB , so I have no idea which mod might have the bug. I'm sure it's not a TDD bug because I've played TDD alone past this point w/o this happening.
Instead of the Sahuagin showing up early in the battle as in un-modded SoA/ToB, the battle lasted until all but Githyanki Captain had been killed. He is unkillable because he has to ask Seamon about the silver sword blade. However, this didn't happen until I went and talked to Seamon a second time, in the middle of the battle, causing him to repeat a previous conversation which occurs prior to the Githyanki attack. Then the Githyankli Captian goes into his speech about the blade and the Sahuagin board.
In my inventory, I wound up wih 4 silver sword blades, two of which are "This item cannot be removed".