I am looking to upgrade a flight in December. Called Emirates in Dubai to check availability. The call-center agent said all 8 F seats are taken. EF shows one blocked, 3 taken, 4 available. It has shown this exact breakdown for weeks.

MMB says no miles upgrades available, but that could also be due to fare class. The agent also said the most up-to-date is MMB, it updates faster than the call-center system!

What are your thoughts on this? Is this just a fluke because someone booked a lot just now, or can EF be way off?