Chat Requests with Data in URL going to Default Chat Queue

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I have set up Product-based queue routing in one of my interfaces.  For testing/development purposes, when I go from the Customer Portal to the Launch page, routing works as expected.  Example:

https://hrbtrc--tst.custhelp.com/app/chat/chat_launch/request_source/7/chat_data/aGFzaD0xNTM5OTAxMTc1NTAzam85Z2Q.

Selecting "Business" from the Topic field (renamed product field to Topic) routes the chat to the queue TRC - Business.  Selecting other Topics will route to other queues.

However, in production we do not use CP - we go from a "Chat" button on our site to the interface Chat Launch page, passing end-user account data in the URL. Example: