How do I edit the addresses?

I have tried to edit some addresses from my Yahoo address file. I cannot succeed.

When I start to enter an email address, a dropdown list of emails pops up. Thats convenient, however there are several emaiI addresses there I do not recoginize and wish to delete. Is there a way to edit that drop down list ??

edit e-mail addresses

My Group's member list shows ONLY obscure email addresses for my members, which often have no evident correlation with the individual's name. I would like to edit the membership list so a person can actually tell who the members are.

some addresses which were marked "spam" earlier need to be brought back to normal mail.How do I do it?

some of my e=mail address have changed etc.How can I edit them..I used to be able to do it easily.But can't find a way to do it now.

I dont want both the full name & there email addresses to be seen together when I send email to more than one person. I have had problems with someone harassing other people that emails were shown along with there names.

when i reply the othere names and address are there and I can't delete them. I tried coping but it won't delete. and I don't want to send everyones Id on to everyone, how do I get rid of them before forward? thank you