AO Giving Different Colours to Surfaces

Hello,
When I add AO to my scene and generate the lighting, everything seems to work as intended. Except... well, take a look at the photo below. This only seems to happen when I enable AO. I am using Baked GI, Skybox Reflections and I am using Lightmap UV generation on Import.

I have played with several different settings and rebaked/cleared several times. The colour doesn't change if I move the model or the Direction Light, so I don't believe it's a reflection issue. Any one know how to fix this? Oh, and I am not using imported textures. I am setting the Albedo colour from a material I make inside Unity.