It's because many of your posts seem a little spammy, so someone added you to Cheetah. Upon examination I think your posts are mostly fine, I would avoid the few comments that could be said about any post, and I would go to Steemit.chat #steemitabuse-appeals. Hopefully someone there will remove you from the bot.
If nobody listens in there, you can appeal to someone with Steem Power to help you fix your reputation and defend your comments from the bot.
Thank you very much!