I've finally broke down and had to make a post asking for assistance on the created merchant with a updated treasure table.
I created a couple of new skills and if I drop them in the world they work and have no issue. But when I try to have a merchant sell them his inventory is blank.
Fyi they are target spells.
I followed the "https://docs.larian.game/Part_4:_adding_the_skillbook_to_a_vendor" guide just as an fyi.
I've tried different merchants and if I use a table from shared it's fine but again not with custom. I've reloaded the level and tested skills again and no issue. They aren't flagged as story items. He is in my own root folder.
If anyone knows how to help it would be appreciated.