MIL made her own seating chart....

I have a couple of questions here and ANY insight would help. As some background info the deal with the wedding was brides parents get 50 invites, grooms parents get 50 invites, bride and groom get 50 invites. Anyone who wants more invites can pay per person for that cost. My side (bride) wanted more invites and paid for them accordingly so now the split is about 80 (brides parents), 50 grooms parents, 50 Bride and Groom.I have 2 issues. First of all the room is a perfect rectangle with the dance floor in the middle splitting the room in an even half and half. Bride and Groom are at a sweetheart table and the original idea was that the room would be spilt in half that way people would know each other. Now since the invite list favors the brides side I am not sure how to even things out. Some of my side needs to overflow on the "grooms side" but I don't want all of them to have to sit in the far corner of the room.Second, this is the more pressing issue. My wedding planner copied everyone on the seating chart and my MIL was the first to respond with her seating requests. She reserved an entire side of the room (even though she has the least amount of guests) and is only putting 6-7 ppl at rounds of 10 and expecting that my friends or my fiancés friends fill in the rest of the seats. She also has put all of her tables closest to the dance floor and sweetheart table which I was planning on reserving for our friends since after all it is OUR big day. Without destroying the rest of my life how do I rectify this? via /r/weddingplanning http://ift.tt/2ua8pIP