Matrix representation is transposed
When browsing the Data tab of any entry, matrices are shown in their transposed form wrt to the dimensions printed, e.g. https://nomad-lab.eu/prod/v1/staging/gui/search/entries/entry/id/x7aIY5RPy5WqeLi2g4aC4Wb4zLmz/data/run/method/k_mesh/points
The implicit standard is that the m stands for the no. rows and n for the no. columns in (m x n). It would also help in scrolling through the example.