It's not a bug but a "feature".
The way the links are tracked are via the "share" links which are of the form:
where the first number is the question id and the second is the user id. The link above is for this question and has my user id. If it was your share link it would be:
There are two possibilities:
- Someone else has shared a question but introduced a typo to the link which just happens to match your user id.
- Someone has constructed a link of this form and used your user id - possibly by accident, but in the case of Ars Technica it appears to be deliberate policy to "reward" a specific user (see Matsemann's answer)
There are no moderator tools available to tell us where incoming links are from. I assume that the community team would have access to this information, but I don't know whether they'd share that information.