yahoo and their never ending message sending!

I sent a message to a yahoo list and now everyone is getting it 20 plus times. WHY?
Now there is a thread on the list about me sending multiple emails! I just sent one little email and I feel like evil emailer from multiple planet. Yahoo is always doing this crap. Surely after all these years they can sort this out? I mean what is it about yahooo, that either you get the same email one million times, or you get emails through 500 years late? (ok I know I'm known to exaggerate)

yahoo sort it out just so I can go back on the list and not feel like miss multiple spammer