Bridesmaids not getting along.

Something that all these " team wedding" and MOH duties on TV and social media forget, often, is accepted good manners. So they suggest that the bride delegate things, you do the chats and texts, you plan this gathering, etc. All like a job. But each bridesmaid is someone you personally want to do you the honor of standing beside you. This is not a job, or the army. Their os no chain of command. If you want any bridesmaid to know something, or any MOH, you as bride need to communicate with them directly. Not have another BM or MOH do it. It is very rude to delegate things in an honorary social thing. You are the bride, but a friend not a boss. No one is your second in command. TV shows talk about teams, but it is a bad comparison.
Any information you want any bridesmaid to know, you say to them, or call, and give the word directly.
Unintentionally, you have set up your sister like second in command, and she is catching the blowback. I realize that you likely read articles here on WW, or saw in shows that delegating is ok. But it has always, not just in weddings, wron or rude to set up intermediary "bosses" over people you are asking to do something special. The personal relationship with you is the only reason people are doing it. Apologize, soothe her feelings. She, and maybe others, may have been annoyed by/ not paid attention to anything that did not come from you before. And now are unprepared. *** This same thing often resurfaces over showers, or bachelorette parties. Only those in the wedding party, or other friends or family who volunteer to do a party, are hostesses. And all have an equal say. If your sister of someone else ( including you) plans it, expect to take all responsibility, including paying every cent for everybody. You plan, you decide, you pay. or MOH plans and decides, MOH pays. Because you are the only hostess. If 1 or 2 or more BM, or relatives, or friends not in BP agree to work together, then they split costs. But no one person can plan everything, then expect others to pay shares. Again, these people are doing you the Honor of standing up with YOU, but no one is their boss and in control of things a group is doing. TV dramas thrive on conflict, and advocate maximum selfishness. So they set a very bad example. The only difference between a MOH and a bride is that the extra honor goes to the one or ones you have known longer, or feel closer to. It is not a rank of job duties. Neither one is above the other , otherwise. Many a bridal party is destroyed , friendships gone, because brides treat people differently. Or try to promote and demote. MOH is an extra honor, that is all.

Seems like typical jealous sisters fighting for your attention. You should be the one asking for deposits, etc if you want to avoid making it seem like one person is higher than another. Right now it seems like your older sister has priority and your other sister is lashing out. You may also need to sit down with them and tell them you appreciate then being BMs but you would really like if they could be civil during your bachelorette party, wedding, etc so they don't take away from your day

Both of the PP are right- moving forward I would tell them if $$ is needed instead of your MOH. Definitely sit them both down (either together or individually) & have a chat with them.

It sounds like sister's fighting for the MOH spot to me. I would probably try to even out responsibilities if you aren't having a MOH and both of your sisters want to help.

As far as someone thinking it's rude to ask for money for the dress, I would kindly remind them that being in a wedding comes some financial responsibility - usually.