Dynamis Weakness processing not cancelling Special Abilities.

Platform: Xbox 360
ISP:Comcast
Type of Internet Connection:Cable
Internet Connection Speed:50MBps
Date & Time: 1/31/2014, 3:30PM MST
Frequency:Sometimes
Character Name:Mlrlohki
Race:Mithra
World:Shiva
Main Job:Blue Mage 99
Support Job: Dancer 49
Area and Coordinates: Dynamis - San d'Oria
Party or Solo:Solo
NPC Name:None
Monster Name:Several Vanguard creatures, including Voidstreaker Butchnotch
Steps:
Process a weakness on a creature.
Receive "Mlrlohki's attack staggers the fiend!"
The monster still uses its special ability (Mijin Gakure, Perfect Dodge, etc)

Was this with all 5 time extenders key-items in your possession? (Red !! weakness trigger) Otherwise (blue or yellow !!), they are able to re-use/use special abilities. If you did have all 5, I would suggest adding it in your steps. It would help them out. If not, there's the issue.

MiriOhki is in my linkshell, To update, if this is the instance i am thinking of we came to find that he missed a TE somewhere.