Add an extra join condition so you only get a single occurrence:
...
INNER JOIN (SELECT ConsumerID, ConsumerAccountID
FROM Consumer
WHERE ConsumerType = 'S') s ON p.ConsumerAccountID = s.ConsumerAccountID
AND p.ConsumerID < s.ConsumerID
Edit: Moved AND condition to separate line to make it easier to see in code window.
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".