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A green-screen shot has areas that are ‘flat,’ meaning that the RGB values are largely constant over a large area of the screen. Normally, SynthEyes works adaptively to locate trackable features distributed across the image, but that can backfire on green- screen shots, because there are usually no features on the screen, except for the comparatively few that you have provided. SynthEyes then goes looking for video noise, film grain, small shadows, etc. Some of the time, it is successful at tracking small defects in the screen.
You can reduce the number of blips generated on these shots by turning down the Density/1K number in the Small column of the Advanced Feature dialog, typically to 1%. Try it with Auto Re-blip turned on, then close the panel, Clear All Blips and do a Blips All Frames.
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