Reference list numbers don't match the reference numbers in article text until you start editing, when template-generated references are present.

For example:

1. Visit https://en.wikipedia.org/wiki/The_Fighting_Temeraire#In_popular_culture_and_on_currency (last reference on the page is currently number 33)
   
2. Open visual editor. Due to T52474, the last reference on the page is now 31, and this is expected for now (there are 2 references defined in a "Poemquote" template earlier on the page). However, the reference list still shows it as 33, which is not expected.
   
3. Type anything somewhere in the editor. The reference list changes to reflect the numbers from the page. (The multi-column formatting also changes in this article, but that's probably some issue with the local template.)
   

The reference list numbers should be updated immediately when opening the editor on the page, and not only after starting to edit.