Why do you think Guilty only got only number 2 on Oricon?

[nEwly]

I don't think there is any thread like that, I have nothing found by search.
But if there are some dicussions about it, excuse me^^

So I was just thaught of something and then I remembered, that Ayu's latest album Guilty only got the position 2 at Oricon. So
Why do you think Guilty didn't sell very well and why did Guilty not peak at number 1?

I think it was a bad time to release it when EXILE released something ago and maybe there were too many singles released from this album?
What do you think?

EDIT: I have seen that I made a mistake in the thread's title xD But I don't know how to edit it^^