While I was testing the new release of my plugin One Word A Day on my live site it created ten new posts automatically. I didn’t notice that. So I left my work to do some sports tonight. When I came back online I checked my website’s traffic and I was surprised about unbeleivable 150 unique visitors more than usual. Soon I saw that those came to my site due to a bug in my plugin. I’m not sure now if it’s really a bug or maybe a feature 
why did it create 10 posts instead of one?
This might happen sometimes. Is it every time on your blog?
ah, no, it didn’t happen to me I just read your post and was curios what had gone wrong
I don’t know anymore what went wrong. It’s too far to remember it. I think I should update the plugins soon. There are more and more people using them.