Related to this booking, I've just noticed that BA have allocated us seats 7 days out. I can't find reference to this anywhere - all the material here and on ba.com says 3 days. Any ideas?

Also, we've been assigned 7A, C & D. In MMB I can change these. for a fee. However, moving just 1 passenger would incur a £60 charge (i.e. 3 x £20) - surely a glitch!