when you only see the CONNECT request in the logs, what is the status code shown? When only the CONNECT is visible it is possible that SSL Scanner is not executed to terminate the SSL tunnel. The SSL tunnel needs to be terminated before you can see URLs in the logs, and before this happens the rules won't be executed since MWG does not see the "URL" specified in your rules but only the host name.
Can you check that SSL is really decrypted? There must be an "enable content inspection" setting which is called for this URL when the browser accesses it. It is still possible that the browser validates the server certificate... in this case you won't have a chance to put in your own list.
A rather simple alternative may be this approach: Create a list of URLs you want the compatibility mode for. When such a URL is called add a custom "X-UA-Compatible" HTTP header which enabled compatibility view for this URL. This should do the trick as well :-)