Joyous Journey Buff Not Working as intended?

So, I’ve been playing with some guildies, and we’ve been talking about how slowly we’re leveling. We’ve run two instances and barely gained half a level with Two Heirlooms on, so we’re running 70% xp buffed with rested XP and the xp we’re getting per kill feels like its the same as per normal. Even the quest XP seems low… Anyone else experiencing thing? … Yes we have the buff on.