Click on "Date" and you'll be back to normal.
I have problems with Hotmail a LOT. I can't even use my Messenger anymore, it's so screwed up. I contacted the techs there, and they couldn't figure out what the problem was. I would do better if I just got a new address(I've been tempted), but that's hard to do when I've had it for so long.
For this reason, I don't stick with just one email address. I also use yahoo, and only once have I had it where BOTH were screwed up on the same day.