Trying to make Toon Shader Material on UE4

Managed to fix it. Float 4 apparently means that it has an alpha channel in addition the the 3 RGB channels. I just added just the RGB channels and then plugged it in:

The problem that now comes up is that there’s an extra band where it doesn’t need to. The band texture shows only 2 bands, but the model displays 3.

The 3rd band disappears when it’s in a shadow.

Does anyone know why this happens? Why do the 3rd band disappear when it goes into the shadows? Is there a way to remove it completely?

Edit: Here are a few screens of it with “lightning only” turned on.