Bridesmaid dress nightmare

So, we were going to order bridesmaid dresses from eBay, but we discovered that they would not come in fast enough. So trying not to freak, my MOH and I went to David's bridal to find ones to order. We picked out two short styles ( I wanted long or tea length). One was $80, the other $150. We sent pics to my two other bridesmaids for their input- one lives out of town, the other had to work. Worker bee balks at price of both, and my offer to buy it. Then goes with her cousin to look and see what size she needs. Tries to get me to order a dress from JCPenney's instead. I know she on a budget, so I looked online, but honestly didn't see anything in the sizes or colors we need/ want. Then worker bee says she will go with what I want. Then decided she doesn't like how the cheaper dress looked, and wants the second one. I am putting her dress and MOH dresses on my David's bridal card and they will make payments to me. Then last night we go to the store to make final decision so we can order, but she doesn't like the Malibu blue on her. I want 3 different colors. Unfortunately, the store is very limited in what colors we can order that will arrive in time. So the choice is put her in horizon blue that she wants or put all three in Regency purple, or be a be-yotch and insist on Malibu for her. She loves the Regency color too. I am beyond frustrated and don't know what to do. Please help.
Thanks