Automaton casting Erase for no effect when master has "aura" type negative status

[Treyd]

ISP: Not sure as it is complementary with where I live
Type of Internet Connection: Optic Fiber
Internet Connection Speed: Also not sure
Date & Time: October 30, 2011 13:30 EST
Frequency: Always
Character Name: Treyd
Race: HumeM
Main Job: PUP 95
Support Job: DNC 47
Area and Coordinates: Abyssea - Vunkerl (F-7)
Party or Solo: Solo
NPC Name: None
Monster Name: Armillaria
Steps:
1. Equipped automaton with Soulsoother C-1000 head and Stormwaker Y-700 Frame
2. Equipped automaton attachments: Tranquilzer, Mana Booster, Power Cooler, Shock Absorber, Turbo Charger, Mana Jammer II, Stealth Screen, Mana Converter, Mana Tank, Damage Gauge, Vivi-valve, Auto-repair Kit II
3. Begin fight with Armillaria
4. As fight progresses, when Armillaria afflicts the master with any "aura" type status, the automaton will attempt to cast erase to remove the status when the spell timer is ready. This happened multiple times throughout fight.

Note: This was also tested with Iku-turso's silence aura effect last night with the same results. I do not know how this works in a party type situation if anyone is able to test it.

Edit: Got a chance to test with another PUP. It does happen with other party members, but only if you have a Water Maneuver up which tells the auto to cure party statuses.