Traveling Europe and learning the ropes... which station do you get off to switch trains... or none? This is like "monopoly"... get it right and you keep moving, get it wrong.."pay $400, do not pass go". you mis your next train, get caught up in a complex train system and lost for hours... maybe days :) I can see how people end up in the lost and found in Europe.
We survived this leg of the trip with the help of outgoing helpful Americans whom saw us in distress and intervened to direct us, and as well some French angels that saw us in line, pulled us out, and got us on a train to our destination. There's good people in the world... counting good fortunes...
I will give correct answer in a short while...
The correct answer is "other", per the technical support. You must check with the train line (SNCF) prior to departure to validate where the train is going and stopping, due to changes. Tansfer means transfer unless it means stay on the trian.
If I'm still a stupid American...