Exactly! Unfortunately 1814 is incomplete in the chart. The Kingdom of Hanover was founded in 1814, the German Confederation in 1815.
I myself always follow the path in the chart and shorten the result to four entries so that the result is unambiguous. In doing so, I allow myself a few liberties that will probably give some historians a headache. Since, for example, the Holy Roman Empire ended in 1806 and the German Confederation was not founded until 1815, I still assign associated places in this period to the Holy Roman Empire.
1814: Marx, Aurich, Hannover, Heiliges Römisches Reich
1847: Marx, Aurich, Hannover, Deutscher Bund
1886: Marx, Aurich, Hannover, Deutsches Reich
You could sum it up as "Marx, Aurich, Hanover, Germany", which is what I've mostly done myself, but the above information is more accurate, which many genealogists and WikiTree prefer ("We aim to use the name that was used in that place, at the time of the event you're recording.").