Blog Spamming

I can't understand why my blog was flagged as spamming? I don't do anything like other spammers does and I only write a simple blog with one keyword linked to a site and that's it. How come it is called spamming? My blogs had sense to it and It's original, I don't know why every now and then a I get a notification from blogger. That is a pain and I am planning to move all my remaining blogs to wordpress that I will manage and host if they always do it to me.