Because Special Relativity only applies to uniform reference frames [including reference frames where an observer is measuring the speed of light] when the motion of an observer relative to what he is observing is no longer uniform, the rules of Special Relativity can be broken.
So if I understand you correctly, if something is moving erratically it can move faster than light, and only if it moves at a constant velocity can it be said that it cannot go faster than light?
That doesn’t seem right. Vigorous enough wiggling could hypothetically allow FTL travel while negating all time dilation.
Two observers separated by large enough distance are not in uniform reference frames with respect to each other.