Datamined 9th Anniversary is incorrect?

[Trailsong]

Um... strange note.

Has anyone else noticed that they're pumping WoW's 9th Anniversaryin the datamining from 5.1... but it's only the 8th Anniversary? We just hit the official 7th Anniversary last year (look at your Feats of Strength, folks)... gaudy sweater and all. Did we just skip a year somewhere? Or is Blizz using the first-run pentiums for their math?

Also, given that 8 is such a lucky number in Asian cultures (upon which Panda is based), why aren't they hyping that very same 8th Anniversary during Pandalandia as something much more lucky?

[Rivin]

WoW's 8th Anniversary

They're adding each one a year in advance.