Landscape Material, Multiplying textures Why?

Hi, I’m brazilian so my english is not very good,i’m with a problem in Unreal Engine 4.Look The Pictures

Landscape Material Blueprint:

http:imagizer.imageshack.us/a/img538/9360/oIwrJX.png

http:imagizer.imageshack.us/a/img661/3861/ARv1gB.png

http:imagizer.imageshack.us/a/img633/6954/i4OtG9.png

Bug Multiply:

http:imagizer.imageshack.us/a/img908/7615/ZyVa3Q.png

http:imagizer.imageshack.us/a/img905/485/uMmamA.png

How can i fix it?