You should put a post up on DT, new topic, saying just that.
It's not Open Yet.
Say that you live in the area and that the store, is not, in fact open. You should ask if previous posters were employees? Or something. Don't be confrontational, but list the facts as you see them. And definitely don't add is as a thread on the original post, make a whole new topic. If you do, I'll try and affirm your post.