My MMR is very low... why?

KSGHook - Summoner search results - League of Legends
KSGHook / Bronze 2 0LP / 147W 154L Win Ratio 49% / Teemo - 30W 35L Win Ratio 46%, Kayle - 26W 21L Win Ratio 55%, Vi - 22W 10L Win Ratio 69%, Rammus - 16W 6L Win Ratio 73%, Yorick - 8W 9L Win Ratio 47%
So I've been on a pretty strong winning streak lately, and have gotten to bronze 2 off of it. Now I'm getting 16 LP per win and says that my MMR is very low for my ranking... but I've won 58% of my recent games? What is this?
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