Landscape Material Layers not Showing

The landscape I imported into UE4 is using weight blends, and has 16 tiles. The material I am currently using has selections for 15 layers of materials, and is currently working in a one tile landscape just fine. When I put this material onto the 16 tile landscape however, only one material is showing up. I am using World Machine for the landscape, and am exporting weight blends for each material. Currently I am only testing four different terrain types, so only 4 weight blends.

The problem is that only one material shows up, blanketing the entire landscape instead of the masks letting all the materials show. May I ask why this is, I am really hoping for a solution. :frowning:

Here is a picture of the landscape: