That's just based on it being wording from when it was originally posted. I don't edit that every time we bump a post at a lower price.
But I do try and change if it's not the lowest ever wording, although it's also still wording from a previous post, with the old title still there.
I hear that, that leads me to my previous suggestion for a post date and updated date, so we can see which part of the post is old and which is updated.
Perhaps when editing / correcting a post (for anything not a typo), a small tag can be added with a time stamp and to state the change was made. (@Dan)
Like so:
