Consider this setup:
Four trucks load from the mine and unload in the train station. Two large trains take the coal from there to a power station at the other side of the map.
a) Why in the world is not the station rating higher (I'd even say "excellent") when trucks are constantly loading? There haven't been crashes, trucks are brand new (game started in 1940) and obviously there have never been 100 units waiting.
b) How is the "transported cargo" calculated? Common sense tells me it should be 100% in this particular case.
The most intriguing thing to me is that both station rating and % transported have been decreasing in the last months (they where excellent and 80% for a few months). What's more, if production increase is linked to station rating (playing vanilla, no weird industry rules here), why not only it keeps constant, but in fact fluctuates between 128 and 144 t/month? I mean, there are months where it decreases.