i am Having a Hard Time with Bridesmaids Dresses

Hey Ladies. So I have 11 BM's and I love them all dearly. Most of them are easy going, but there are a few, mainly those that have my same last name that are being really high maintenance. I told the ladies that as long as the dresses are the correct color and all the same fabric, then they can choose whatever style they like. I have no had a stressful moment yet while planning my wedding and now here it is. There are some saying they don't want another lady to look better than them, they are searching for dresses on totally different websites and stores and sending me pictures of dresses that aren't even the right color blue. It's driving me nuts. I am beginning to think that I am going to just pick a dress and they all wear the same damn style. I was trying to give them the chance to let their individuality show, but they are ruining it for me. What are your thoughts on how I should handle this? My FH is having a ball getting all of his guys fitted. 6 of my girls are so easy going, the other 5 are giving me grey hairs.