We have been advised that a recent article of ours was incorrectly published as article type y instead of article type x. Article type x and y are very similar, having the same word counts, similar structure, and the same fees. It is just that the name of the article type (x vs y) is different.
It was our error for selecting the incorrect article type when submitting the article, but the article's title and some of the responses to the reviewer made it clear which article type we were aiming for.
The journal would now like us to issue a corringendum that states 'This article was supposed to be published as an x type article rather than a y type article'. However, I am wondering if this is more suitable as an erratum? i.e. that the journal was to blame for this error.