Create sin waves but the wavelengths don't seem correct

[maxelcat]

Hi

I want to have two wavelengths of a sin wave fitting across my composition of width 1920px. I have set the wave warp like this with speed - so it is stationary but ultimately I want it to travel across the screen

However, what I am getting is not two cycles but is like this:

I must be doing something wrong? Any ideas what?

Thanks

[Mylenium]

Effects operate based on layer coordinates and even though you made your screenshots mostly useless by cropping them, one can see that the line is longer than the comp is wide. Of course this would cause the line to be offset plus using a shape layer directly has its own quirks. For distortion effects it's best to pre-compose to the desired layer size for predictable results.

Mylenium