Thanks for this sample input. Before going any further I should just mention that passing raw SQL in a query string like this sets off all sorts of security Klaxons. Hopefully you are already aware of this and have taken all appropriate countermeasures.

How do you know the second key is not processed? Are you viewing the results in a browser? If so, by the time the second key is reached your browser may have already refreshed and taken you to the URL in the first value at which point the rest of the script's output will be unseen.

Did you run my SSCCE and determine for yourself that it processes the template inside the loop multiple times successfully?