I cannot get the position, rotation, scale or opacity commands to do anything. I change the numbers and the picture stays the same. If I apply the Luma Key to track 1, select "key out brighter" and adjust the tolerance, the bright areas turn black, not transparent. You can't see track 2 through the keyed areas. This all happened at the same time. is there a setting that I maybe maladjusted?
Live update may be turned off. Also, try resetting your workspace. If that doesn't work, delete your preferences file.