Joan, Yes I can get the list of postems I've added, then delete them. That's what I've been doing.
Why do I have to do that?
When I add a postem, my choices are 'preview' and 'post'. The box where I used to type in my user name is gone.
I was contacted by the owner of the gedcom and asked to remove them since she could not do it herself.
She gets an email saying the postem was added, and used to be able to click the link and delete it. She can't do that anymore.