The crosstalk you're seeing is almost certainly due to the glasses. Try a different brand and you might get better results.
When I first got my 3D DLP projector and glasses, I often wore the glasses tilted downward a bit because they rest on my head more comfortably that way. Saw no crosstalk. Then I got a high gain screen which doubled the brightness, and I began to see occasional crosstalk on bright objects. However, once I put the glasses on straight and wore them like I was supposed to, crosstalk disappeared. It was a good lesson that shutter glasses aren't foolproof.