New BSP cube - applying a picture to a side and this picture is 4 times there

How can I fix this, when I apply new material to a single side of a BSP cube it is applied 4 times on that side. I attach a picture 1 you can see a melon picture is applied 4 times on the side of the cube.

edit: sometimes I split the bsp from the editor into 4 and cut the extra pieces but if the object is more complex this will not help

Also if you know please tell me how to make a picture continue after an edge of a material, for example If i make a cylynder and I want to make it looks like its wooden, I apply a Pine Wood material but each individual side starts the picture again, I show this in picture 2