Hi Alan,
Thanks for your reply. Yes, quite close to YMML, only about 4Nm.
Before making my post, I had moved up four places on the ranking for Au and was showing a yellow bar. I agree that yellow=no data does seem to make sense but the stats were moving me up the ranking and listing my max and avg range, which doesn't make sense if I'm not sending data! Since making my post, I have moved up two more places in the ranking and have now gotten a green bar as well.
Monthly uptime % doesn't seem to work either and I have noticed there's a difference between the uptime % on the stats page and the uptime % on the station page. Perhaps there's a delay? I still haven't figured it out so I might try emailing them as you suggest.
I'll see if they can post here or I will otherwise report back with any info so others will know too. I always like to know how I'm being judged! :P