Yes, that is correct and needs to be fixed. I used to be in the top 5 and now I'm 15 on mine. Why? Because I was honest and put all my toons on there and imported. I still have the same pets, but now only my main shows up. I just ranted about this on my comment on my page. >.< I know several of the other collectors on my realm who are still at the top and they have them spread out too. Guess I was stupid to import. Should have just added them all to my main. So much for being honest. My collection at 172 pets isn't even showing up in the 50 account-wide collections and the highest pet collection in there is 171, so I don't get THAT either. Needs to be fixed or show both single and account wide on realm stats. I mean, if FAIRNESS is a question here.
In my opinion as a six year long pet collector in this game.. all pet collections should be based on account.. not on your main. Collected is after all.. collected. AND Armory Import should be mandatory.