I seem to have managed to log onto two servers at once by accident. I noticed it on "redstoner.com" when I started getting a feed from "pvp.vnlla.org" on chat. I believe the issue was caused when I cancelled logging onto the latter one, and instantly logged onto redstoner.com. Minecraft decided to keep me into pvp.vnlla.org throughout the process and its chat feed would keep on coming even from another server, different from redstoner.com. I managed to record it. I'll attach the file to this report. The day and night cycles were "messed up." The game, for me, and not for anyone else, was swapping from day to night every tick. Also, in the video: the two people that "fall off the world" are from pvp.vnlla.com. The rest are from the other server I was on. The one I was actually intending to be on.