Storm Y-700 Head Delayed Shell 5, and unable to overwrite Haste 1.

Platform: Windows
ISP: Virgin Media
Type of Internet Connection: Fiber
Internet Connection Speed: 30mbps
Date & Time: July 7th 2014
Frequency: Multiple Times
Character Name: Balloon
Race: HumeM
World: Cerberus
Main Job: Puppetmaster, Lv.99
Support Job: White Mage
Area and Coordinates: Ceizak Battlegrounds
Party or Solo: Solo
NPC Name: Sentinel (Automaton)
Monster Name: Blanched Mandagora

Steps:
Was testing to see when my Automaton would cast the new Haste 2 spell, had engaged it and found that he would cast Protect 5, Stoneskin, Phalanx, Haste 2 and then, after around 20 minutes Shell 5.

While I haven't used this automaton head in a while, I believe that this used to go Protect 5, then Shell 5.

Further to this, I found the automaton was unable to overwrite Haste (Cast by myself) with the newly update Haste II, despite one being of much higher potency than the other.