Strange thing on my Hotmail

For some reason i tried to open my junk mail and to my surprise i saw some of my mylot notifications there. No wonder i couldn't see some of the responses on my discussions on my inbox, it's because they're all in the junk! I don't know how it went there. And one more thing, I'm not getting mail notifications of my friends' discussions. Something odd is happening to my mail! What's wrong with it?