Upvote:0
- If the visa officials believe that the initial application was fraudulent, you have a problem. There have been issues especially with single-entry visa, that depends on how vigilant/concerned the entry officials in your new destination are.
- If the visa officials believe that you are adjusting your itinerary in good faith, that's what the Schengen area and multiple-entry visa are all about, and you have no problem.
I don't think we can give you firm assurances without knowing more. If you are really worried, take the train to your first trip, that will get you a French entry stamp.