I've been having trouble with an effect I'm trying to achieve.
Right now I'm using a 2D texture for black and white tiles that has normals applied in the influence tab.

Since I also need a dirty map that I don't want invovled with the normals of the tile texture, I added another texture tab in the material. However, as it stands right now, with the UV texture, the result is not quite right for me.

Therefore, I tried to scale down the UVs I selected, but when I do, the tiles become bigger. It must be because the UVs for both images are connected, where I cannot change the UV position and size for one image without doing the same for the other.

Is there a way for me to change the UV size for one projected image without effecting the UVs for a different image within the same material on the same object?
Maybe I could make a transparent layer above the floor and create an image of the dirty map on top instead, but I want to know if this is possible first... Thank you in advance!