Does it really matter? Isn't the whole point of a wedding about the couple getting married not the attendants if there are any?
I think as a up and coming bride, yes dusty, it is a big deal. You want to get the whole day right, you want everyone to be happy, you want YOUR day to be just perfect. I can totally, totally understand her predicament.

I think she's going to have sister #3 sign the papers, yet have us walk into the church from oldest to youngest....ahhh the fun begins.......thanks ladies...