I have a Caravel that decided its ok to take a full load of tools to try to sell in Europe, and when the Europe screen pops up, I don't sell the tools (since I need them in one of my cities) so I tell the caravel to return to the new world. The caravel gets placed in the slot to say it's going back to the new world with my tools onboard, only to have one or two turns go by and the Europe screen pops up again with the same damn caravel wanting to sell those tools to Europe. The only way around it was to sell one stack of tools and buy a person to shove onboard and then send it back to the new world. This caravel was originally set to full automatic but where it got the idea to take tools from a city that is not exporting tools and go sell them to Europe and leave me in a pinch, I have no idea. No matter how many times I told this caravel to return to the new world, it refused to make the full trip, it would end up in the slot to return to the new world but would never pop up on the landscape screen, it would just return to Europe for me to instruct it to return to the new world, I tried this no less than a dozen times (turns) and it still wouldn't return to the new world with my tools onboard.