en.wikipedia.org/wiki/Queen_Victoria

The date in the honours list is off by two months. The official record in The Gazette — the authoritative publication for British honours and warrants — says the Distinguished Service Order was first established by Queen Victoria on 6 September 1886. It also notes that the first awards were made later, on 25 November 1886.

That means 6 November 1886 is not the establishment date of the Distinguished Service Order, so the date given here is incorrect.