Customer Groups and Sales Categories - Epicor 9

I have set up unique Control Codes for the Control Type "department" in order for the Sales Category to point to the right revenue account based on Customer Group. So far it seems to be ignoring the Control Code on Department and hitting the default account. I know it has something to do with Department code but can't get it to work and a call into Epicor support hasnt resolved it yet.
Anyone using Customer Groups and Sales Categories to post to different revenue accounts?

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