Druid flightform is bugged

Ive made several tickets about this matter and the GMs keep saying this is an issue of the guildperk wich is not.

Atm I have 2 druids.

1: Night elf, Cyclowned @ Terenas
2: Tauren, Burgershift @ Draenor
3: troll, ticiana @ Draenor , deleted awhile ago

I have purchased mastery riding on my nightelf druid long time ago. and the buff for flightform in my spellbook said:

--Shapeshift into swift flight form, increasing movement speed by 310% and allowing you to fly. Cannot use in combat.

Ive purchased Mastery riding on both my troll and tauren druid. and even without guild i am not getting the benefits of mastery riding.

on my troll and tauren the buff said:
Shapeshift into swift flight form, increasing movement speed by 280% and allowing you to fly. Cannot use in combat.

while the tooltip while beeing in flightform on the buff displays 310%

so please fix this. or refund my 4k gold!