Cherk that you have defined the slave site with the "https" in the list of domains.
I suppose YES as you have a slave site displayed.
If YES, the check if the port (443) is present in the URL. If this is the case then this is normal that JMS display the master because it does not support the port yet.
I suspect that the browser or other think add the port 443 in the URL to get the template.
Perhaps (I don't know) it is possible to check this hypothesis when having a look in the stat of the websites.
If this is a "port" problem, we have currently fixed it internally and the fix will be included in the next release of JMS. This "port" problem was reported with XMLRPC and perhaps this is similar problem.
Otherwise, I don't have any other idea.
This may require a deep analysis on your server.
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