Can you help me get rid of a certain "farmville bug" on my facebook account? :(

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A few days ago, I clicked on to a "farmville link" for farm expansion... I am quite a fan of it hoping that i can avail such reward. I even agreed to post it to my profile so that my friends could avail it too. After clicking the link, sadly there was no expansion happened. I just ignored it because I was thinking that maybe it was just a teaser. To my surprise, the shout out message on my profile appeared to be that same false link. The worse thing about it is that, it replaces my recent posts everyday even if i already cleared it all. Even my friends noticed it! The problem is that, how can I stop the odd posts to my profile without deleting my farmville application?