Secondary Stat Gems Showing up with Higher Stats

[ZenX]

I was going through the WoW Armoury and noticed that gems were displayed having higher stats than they are in the game.
Did anything change with 7.1 or is it just an armoury error?

For examples see below

250 Mastery instead of 100: http://eu.battle.net/wow/en/item/130218
375 Mastery instead of 150: http://eu.battle.net/wow/en/item/130222
500 Agility/Intellect/Strength instead of 200:
http://eu.battle.net/wow/en/item/130247
http://eu.battle.net/wow/en/item/130248
http://eu.battle.net/wow/en/item/130246

[Lioo]

Forever armory bug