After Effects CC Rotate Hue

Hey all. I'm working on a simple video that lasts 3 minutes. I've applied animation presets to the introductory text and all is well. At a specific point I introduce the preset "rotate hue" which also works perfectly, for about 4 seconds then stops. I want the animation to continue through the entire video and, logically move the second keyframe to the end. However, while the animation indeed continues through the video, the effect speed is reduced to a slow and barely perceptible change. How then do I maintain the speed of the effect (apparent in the first few seconds) throughout the entire video? I'd greatly appreciate the help since googling has left me with numb finger tips and a lump on my forehead due to continued contact with the desk in frustration.