Two blue lines

[MahaB82A]

Why there are two blue lines? one is hard line other one is soft line. Moving soft blue line make change in yellow line. Video is attached.

[Rick Gerard]

Those are Gradient Fill and Gradient Stroke Start and End points. With the shape layer selected, press the U key twice and you will find the Gradient fill Start and End points in the timeline. Adjust the values, and you will see the two dots connected by the solid line move. Move them in the Comp panel, and you will see the values change. The dashed line is for the Gradient Stroke property.

[MahaB82A]

In the tutorial when points were pulled there was a move in the gradient when I tried to move points in my work it was splited in two line. 

[MahaB82A]

In the tutorial only soft line is visible. In my work hard line is on the top and soft line is at bottom. When I drag one end line get separated into two lines. One is soft line other one is hard line. How to fix this issue?