I've noticed this a couple of times in Timeless, too, so it's not limited to Vector.

Well, I chose to use archive.ph or archive.is. Even if archive.today would be better, I do not appreciate an automatic change if that's the only thing that's being changed (it would be different if it was part of a bigger changeset). Our policy also states that. And Harej agrees, given that he filed the report. But like I said: it also changes .today to .is, so apparently .today is not preferred either.

I was the one who reported this over on InternetArchiveBot's talk page. This is unacceptable on the Dutch Wikipedia as part of our “if it ain't broke, don't fix it” policy. And requests on behalf of site owners are also looked upon as unwanted on the Dutch Wikipedia. And I agree with that: it's the exact same site.