There's this question on English Language & Usage.
When I visit it, while not being logged in to EL&U (but I am logged in to Stack Exchange and all other sites, if that matters), I see, that Erik Koval's answer is the top one for this question. When I log in and refresh / revisit this question, I can see clearly that Third News' answer is the top one.
What is happening or what am I missing? Is this an intentional feature? What is its purpose?
Note: I posted this question here, not on EL&U's meta, because I found this syndrome on many other sites before, and I have a feeling that it is happening on the entire Stack Exchange network.
Both questions have two votes (currently), and sorting is set to "votes" in my case, regardless of if I'm logged in:
Or not logged in: