This is the biggest weakness of CJ for multi-topic sites, in my opinion. You have to constantly scour their site (and yours) to find correct placements. I love their box that you can automatically shuffle offers into, but you still need to manage the offers down to the very ad that shows up for each merchant. If nothing else, they should let you pick a 'stream' from a given merchant and the merchant can update the offers as time goes on (like Amazon does).
Hello I don't know where your programming skills are, but something like this wouldn't be too hard to write with a PopShops/XML feed. hanji