You are quite probably doing it wrong. Are you manually adding those tiles? THey're not configured in a ready to use B-E tile at all, you ahve to put them in your tileset. Also you MUST NOT have a color (like white) as a backgroud in the tile sheet (they are trasnparent in the image provided. It just appears white jhere because thats the website's background), you want to use an image editing program and make the background transparent (alpha layer). ALso save images as Png. I recommend you poke around your editing program, sounds like you're doing a core step wrong, and you def want to learn to fix that as soon as possible. (If this is not whats wrong with your case, I have no idea. Post a screenshot of the resut and your editor screen or somethin).