After effects Ghosting Problem

That simply looks like some sort of shadow, either from a light, an effect or a layer style. Impossible to say more than that, but check this stuff.

Mylenium 

The only accurate representation of your edges comes when you have the magnification ratio set to 100% and the comp resolution set to Auto (Full). In all other magnification rati,o settings the edges are interpolated with very rhudametric sub-sampling.

The standard workflow uses 25 or 50% magnification ratios and Auto Comp resolution to check for a shot's timing and blocking (how things move) in your shot. Most comps are only one shot or scene. You should not be editing movies in After Effects. This is like a Pencil Test that animators use to figure out if the shot is working. You use a 100 or 200% magnification ratio, or even 400%, to ensure that you have horizontal and vertical edges of hero elements, like your logo, perfectly aligned with the pixel grid. You don't usually run previews at this resolution because they tend to be short, and you check the key elements in their hero or most critical position and timing. That's like the Ink and Paint part of an animator's workflow. 

I hope this helps streamline your workflow.