The way I see it this was them trying to be subtle and it blew up in their face.
There’s no way you accidentally remove all the content about a major artist from your website, sorry, that doesn’t happen. So in my opinion they wanted to take 1D off their site prior to the announcement (which I think will happen Sunday) to cause some talk and buzz surrounding them.
What happened was that everyone jumped on it, and because they aren’t making the announcement yet they panicked and put it back up.
I don’t see how it makes sense otherwise - they didn’t even change the 1D photo to OT4.