Because we ignore citation templates that don't have a value for the "url" parameter (or its aliases when T301516 is addressed), we won't list parameters ignored for these ignored citation templates. Therefore, we won't know that we are ignoring this parameters.

Thus, instead of following this order:

1. Checking that a template's name is listed in our list of citation templates. Ignore template otherwise.
2. Checking that it has a value for the "url" parameter (or one of its aliases, see T301516). Ignore template otherwise.
3. Map parameters to one of our Web2Cit fields using our list of citation templates.
4. Output parameters not mapped.

Consider moving 2 to the bottom.