Lost bridesmaid

So I recently had to tell a bridesmaid that she is not a part of the party anymore.

Background:
Before we moved our wedding date from Oct 1st to March 4th, this bridesmaid (lets call her X) said she would prefer only having to purchase 1 dress for both weddings. Essentially both wedding having the same bridesmaid dress. The other bride and I's color is burgundy. I told X that I would have to see what dress was chosen and if it would work with the rest of my bridesmaids. Well, low and hold the dress wouldn't work. It was a sweetheart style and a little strap off shoulder. The other girls wanted some type of sleeve and not form fitting. This was the exact opposite. I took 2 of my girls to go dress shopping and we found 2 dresses that will work with everyone. I made another appt for my other 2 girls to try them both on and X pretty much told me she's not buying any other dress and she's wearing the one she bought for the other wedding and told me to "back the *blank* off". Shes my best friend and I had to tell her that she's no longer a part of the wedding party because I don't need the stress of her finances a part of my wedding.
Has anyone else had a issue like this?