Mine is not a question. But I guess someone needs to know if something like this is happening to anyone. Today I made a post, and someone else added on the post without my knowledge. Or in other words, I wrote 2 paragraphs, soon after I posted it there were 3. I didn't tell my password to anyone. Strangely enough, it didnt even say that my post was edited. It was as if I wrote 3 paragraphs. I swear I didn't. I am still shocked. Now I edited and deleted it. It was just weird, and I thought I needed to tell it to the moderators.
It's possible there was simply a database error, or it's possible one of the Moderators added their own note to your post, for moderating reasons. Without being able to see what was different, I can't give you any better answer.