This is my first time adding water to a cell, so I probably did something wrong, but it's an interior ice cave kit and it's supposed to be knee to waist deep which is fine. I have my cell Common data tab set with Has Water checked and Default Water as the water type. This is the Water1024CreekFlowSE piece that I set my first corner piece where I needed it to go, and duplicated it and moved each new piece in place just like you do any other floor piece or whatever. There are no overlaps and each piece it fit perfectly with its neighbor. However, I'm getting these strange lines seen in the pic linked below.

Am I doing something wrong? (see picture)

http://ypdesign.com/skyrim/helgen/images/water01.jpg