I think we agree that the 50% drop rate indicated on the Magelo Spiroc Lord page was post-upgrade after epics were released (
http://eq.magelo.com/item/20679). And thus it should be lower.
In any case, there should definitely never be 2.
The PEQ DB has:
Table: 4 Probability: 50% Multiplier: 1
Item Type Chance
Spiroc Wingblade 1H Slashing 100%
Why was this changed?