The situation is as follows
Coal mine which has several "clients", including a coal merchant and a power station.
I've connected both the coal merchant & the power station to the coal mine.
The problem is that sometimes (quite often actually) the stop at the coal mine doesn't have goods for the power station, also meaning that those trucks block access for the others (but that is something else).
I've added a screenshot of the situation (
https://s3.amazonaws.com/www.nathansamson.be/Schermafdruk+van+2014-05-23+20%3A35%3A17.png). You can see the stop not fully being used, at leas 2 trucks waitng for coal for the power station & the power station not being in use at all..<
In principe 523 coals are in transit to the coal station, but that is less than the 1725 load it can handle (as far as I can see).
It is even worse than I thought, because looking at the line delivering coal all of the convoys are empty, so how the number 523 is calculated: no clue actually, it should be 0.
I am using experiment 11.32, with the pakset 128 britain pak.