This being said, there's the very good chance that buyer #1 had posted, (1 minute before you as the time stamps indicate).
Realized his mistake and went in to edit his original post, during the same 1 minute period you were typing and posting yours, in which case he would not yet have seen your post while he was editing.
You posted, (while he was editing), and he posted the edited version at just around the same time, quick enough from his original post as to not create a "last edited" tag.
Sounds to me like all signs point to it being most likely just a simple error and harmless timing thing, no malice intended