Wondering if anyone else has had this, or knows what's going on.

I have a booking in business on BA7058 (IB3166), MAD-LHR. It is shown on the booking (and on myflights) as being operated by an A340-600. However, the seat I have been allocated is 2L, and I am unable to view a seat map on IB/AY/BA to change it. Unless I'm mistaken, based on seat maps available on seat guru, the A340 doesn't have a seat 2L - but an A330 does.

Is is it likely that this will be operated by an A330 but is just coded as an A340, or is there some other problem with my seat allocation here? Thanks.