L2/L1 and L11/L1 cell-factors are never checked to be integer
All levels are created from L0 but they are never checked to have matching cell-sizes.
This creates miscalculations for example when (dis-)aggregating meteo-data from for example a 3km grid (L2) to a 2km grid (L1). Both grids are totally fine for a 100m grid on L0 but the averaging of the meteo-data is wrongly calculated.
Same is true for the routing resolutions (L11).