When you double-tap to dodge in Guild Wars 2, you are invulnerable while dodging. You evade attacks. The daily dodger achievement makes very clear a systematic oddity: the game only counts it as a dodge if the attack hits you and is evaded by the invulnerability mechanic. If you actually dodge the attack so that it does not hit you, that does not count.
Does much trigger off dodges beyond the achievement? It seems odd to have a dodge mechanic that rewards you for failing to actually dodge.