Yes, the event in FTM appears as 3, 2, 0. When I wrote that I did not separately attach any media items, I meant that I did not link a media item in my tree to this event outside of the one attached to the source citation. (Media items can be linked to events without using source citations.)
I am not talking about a web merge or an Ancestry-created citation with citation media from an Ancestry record collection. As I wrote in my original post, this is a source citation *I* created using the "Digitized Online (Church Record, Microfilm)" template, so the media item, as you might imagine, is a JPG of the church register's page that I'm citing, and it's one that I manually "uploaded" to the tree.