CS6 3D Painting Weird Markings Issue

[Gwen Ghostly]

I'm trying out 3D painting in Photoshop CS6 for skin creation. I made 3 base textures and got them "close enough" as far as coloring. I wanted to try out 3D painting to match up the seams and finish up the highlighting and shading. The snapshots contain nips and bits on the skins.

In this first screenshot, You can see that most seams are just a solid color and the legs don't match the torso because they lack the carryover of the shading and highlights. This is just my starting point, and the textures upload to SL as shown: https://gyazo.com/e74a857ade11ce747f4ea8b684aab124

Here, I roughly covered the seams and added blue dots on layers above the model just to show what is going on: https://gyazo.com/c7465b287dcb8ef6d7462831aa63e1ca

The merge result: https://gyazo.com/febca092d6542d857b32967d726b13a7

What you can't see from the above shot is that painting on any area adds weird lines to other areas: https://gyazo.com/422e5fc7896776f4ff9ad0e3c8dc80db

And if I paint directly onto the model without additional layers, it still makes random markings. This is the result of trying to make the upper and lower seamless by painting directly on the model: https://gyazo.com/a8d3b4b1aff86a2bbd378877247885b6