But what you can do now is not leave it up to the trains - you can set stations to be disabled based on circuit conditions. Judging by the screenshot this is a cargo unload/transfer setup. With combinators, determine which of the station has the lowest cargo total, then disable the others. The ...

Since i played the last time Factorio, things must have changed a lot because my one trusty Train Station does not work anymore like it should. I even loaded an old savegame to ensure it's not the Blueprint's fault or something like this. I added the Savegame so you can hopefully please help me to ...