The seat map available at MMB is different from the actual availability. Some seats are blocked by the system on EF but will be shown as occupied at MMB. For example, my beloved 33C is always blocked, you can rarely select it unless you call up CS. Another example is when 4-class 77W is being sold as 3-class (read: SYD/MEL etc). In these scenarios, a quick search on EF would save me a lot of time.

But the major problem here is the system being down for days and showing no sign of improvement