Say no more! You are dealing with SNCF! I was in France this last summer and found that their website was supremely challenging to deal with. In all, I just needed four different trips to book. Their website couldn't handle that some of them were regional trains and one was TGV.

I love France, but that wasn't the end of the inconvenient conveniences. Trying to rent bicycles in Bordeaux and Paris was so much more difficult than it really needed to be.