mil keeps making assumptions

My future mother in law keeps making assumptions about our wedding which I’m not always quick thinking enough to contradict, and I find it really stressful. Examples include:

- that she will bring fiancé’s gran to the venue (when I’ve arrange for MIL to get ready at the venue with us, but not gran, and none of my extended family will be there)

- that her friends will all be at the same table (hopefully they will, but it’s not a given due to odd numbers, table sizes, etc.)
- that all her family will be at home the night before the wedding for a party (fiancé’s sisters are bridesmaids and I had hoped they would stay with me for a girly night the night before)
- that we will have champagne for the toast drink
- that we will be having posed, set photographs (we’ve chosen a documentary style photographer and are not planning any posed shots)
- that they will come to the food tasting (it’s normally limited to just the couple)
They are fairly minor things, but they keep adding up and I am worried she will be disappointed. It is really hard to bring these things up again after they are mentioned in passing, without making a big deal over them, but I keep worrying that because I didn’t disagree at the time she will be more upset when they don’t happen.