by Captain Jack » Sun Jun 11, 2017 2:23 pm
If you set it to sell to Market and your fleets were loaded with the cargo of the port, then the same would happen.
For example, if you have a fleet with ships full of Rum and you create a Fishing Route to Akrotiri (a rum port) with the instruction to sell to market, then, since the Rum cannot be sold to the market and they will remain in the ships, the fleet will go out full and will start gaining danger travelling back and forth to the port and the fishing area.
This has happened before again. For us it is like the mistake to the danger in trade routes with less than 1 hour; being careless => cost. Also, take in mind that the fishing route is destroyed once an attack is received so the losses cannot be great. It is up to luck in how fast the first attack will come if you run into this.
This is most probably what happened. I have no means to check right now if this was 100% the case for you and monty but checking against it on your own is pretty easy. These are the two cases that create the danger (I explained both) and you should be in a position to check this if you ever run into this again.