Following what Danny said...
Is it possible in your movement/AI code for an enemy to be stationary for long enough to spawn another enemy in exactly the same location ? If two enemies then got 'triggered' to start moving, and if they share deterministic (i.e. non-random) AI code, then you could get the effect described.
Is it possible in your movement/AI code for an enemy to be stationary for long enough to spawn another enemy in exactly the same location ? If two enemies then got 'triggered' to start moving, and if they share deterministic (i.e. non-random) AI code, then you could get the effect described.