Was fighting an orc in Dynamis, and I cast Dia II on it. A blue stagger animation appeared above his head and the message "Your attack staggers the fiend!" came up in the log.

Platform:
Xbox 360

ISP:
Comcast

Type of Internet Connection:
Cable? >.>

Internet Connection Speed:
Not sure.

Date & Time:
Friday, May 13th at 7:20ish AM PST.

Frequency:
First experience with this.

Character Name:
Zatias

Race:
ElvaanF

World:
Pandemonium - Asura

Main Job:
Red Mage

Support Job:
Scholar

Area and Coordinates:
Dynamis - Beaucedine at the former "NM lake" near the Mega Boss.

Party or Solo:
A party of 2; me and a Ninja.

NPC Name:
None.

Monster Name:
Vanguard Bugler

Steps:
1. The Ninja pulled the monster with provoke.
2. We began fighting it.
3. I casted Dia II on it. A blue !! appeared above its head and my log displayed "Your attack staggers the fiend!" with no other message (no "unable to ___" message).
4. The ninja and I began spewing random profanities in surprise.

Would like to know if it's a bug or intentional. If it even was intentional, the !! was not yellow, and this happened on Vanadiel WINDSDAY. I be confused D: By the way, the mob dropped nothing when we killed it.