I'm not sure the following behaviour is intended:
I have a setup where a train (eg. locomotive + 4 cars A B C D) is below a series of loaders (1 2 3 4). Each loader contains a different item (I1 I2 I3 I4).
Now the train cars each get loaded with a mixed content (e.g. car A has some of each item I1-I4, same for the other cars).
I would expect that car A gets loaded with I1 from loader 1, car B gets loaded with I2 etc. etc.
I can still get the expected behaviour by setting item filters on all slots of the railcars, but that is quite a lot of clicking ...
I'm not sure whether that behaviour might just be a bug caused by all the different mods running in my game. Or is everyone seeing this behaviour?