Dowager Empress Dagmar - wrong title

I believe this title is wrong.

Styles[edit]
26 November 1847 – 31 July 1853: Her Serene Highness Princess Dagmar of Schleswig-Holstein-Sonderburg-Glücksburg
31 July 1853 – 21 December 1858: Her Highness Princess Dagmar of Denmark
21 December 1858 – 9 November 1866: Her Royal Highness Princess Dagmar of Denmark
9 November 1866 – 13 March 1881: Her Imperial Highness Grand Duchess Maria Feodorovna, Tsesarevna of Russia
13 March 1881 – 1 November 1894: Her Imperial Majesty The Empress of all the Russias
1 November 1894 – 15 March 1917: Her Imperial Majesty The Dowager Empress Maria Feodorovna of Russia
15 March 1917 – 13 October 1928: Her Imperial Majesty The Dowager Empress Maria Feodorovna – a title she was referred to as a courtesy by some foreign royal courts. In fact the title Dowager Empress of Russia had ceased to exist with the collapse of the Russian Empire. In the Crimea after the collapse of the Kerensky provisional government, Maria Feodorovna was publicly referred to by guards as Citizeness Maria Feodorovna Romanova. When asked to sign as former Dowager Empress she refused and signed herself as Widow of Tsar Alexander III.