When they add something, something must be taken away in order to compensate for system load. Their system, the data that is saved server side is immense and it rewrites the data every 15 seconds in case of a roll back you don't lose anything. So in order to keep that 15 second synch, when a new feature meaning more data, needs to be synched something has to go to even it out, or else we need to shift to 30 second synch. Or so they would have you believe.........