On https://beta.acousticbrainz.org/challenges/14095b3b-4469-4e4d-984e-ef5f1a55962c, the dataset submitted last is listed first, which seems wrong. The only other somewhat numeric column in that table is the submission time and that's (at the moment) listing values in a descending order, but # is in ascending order. It also means that the table is not really useful for finding a dataset again, because what was #2 today could be #500 tomorrow.