Cheap Filter?

I purchased a 35mm lens a while back for my Nikon camera.  Amazon had a deal where the lens came with a free Tiffen UV filter.  I put the filter on without thinking much of to it, until recently (when trying to take pictures of my new rug ... yes rug #6), when I noticed that the filter gives a weird glare.  See right next to the pillow, there is this ghosting, kind of looks like a green light?  When I removed the filter the glare was gone.  I tried out my 50 mm which has a nicer Hoya filter, and there was no glare.  I haven't really been happy with my 35mm, and primary have been using my 50, but maybe I will give it another try, sans filter.