The saurian shaman gets saurian wild shape 1/day at level 2. Instead he should get ordinary wild shape 1/day at level 4, and then at level 6 it should change to saurian wild shape (+2 levels for dinosaurs, -2 levels for others).
This was discussed when first entering the archetype and interpreted to mean the druid wild shapes into dinosaurs at 2 levels higher and everything else at 2 levels lower, meaning it gains dino wild shape at 2nd and everything else at 6th.