The last couple of weeks, shortly after Naruto's released on the tracker, I've had trouble getting uTorrent to connect to the tracker, probably because for the first few hours, there's too much traffic for the tracker to handle.
Especially since there are no more fillers, and Anbu/AOne stopped subbing Naruto.
So, my guess is that DB wanted to release Pokemon D&P but were concerned that releasing Pokemon D&P and Naruto at the same time would kill their tracker.
So this is just an excuse to reduce the strain on their tracker.
And also a way to stick it to the Narutards 