Killer Instinct Duration

[Falkirk]

Date & Time: Feb. 24, 2012 at 10am EST
Frequency: Always
Character Name: Falkirk
Race: Galka
Main Job: Beastmaster
Support Job: Dancer
Area and Coordinates: Cape Terrigan at (G-8)
Party or Solo: Solo
NPC Name: N/A
Monster Name: N/A
Steps:
1. Used Call Beast to activate a jug pet (CrudeRaphie in this case) and then used Killer Instinct (had 1 merit in Killer Instinct).
2. Killer Instinct effect lasted for 2 minutes and 55 seconds, instead of the full 3 minute supposed duration.
3. Tested out other Killer circle abilities, and they all lasted for exactly 3 minutes, so was wondering where the missing 5 seconds of Killer Instinct went!

It's a small issue, but thank you for any support you can give.