Is there a way to delete postings once they are made? Thanks!

you mean on this site or just newbb in general?

i've not used newbb very much and was a while ago now, but i don't think members can, but moderators are able to..

most members on this site if they make a post in mistake or double post, they usually just edit the post in question and leave a message or something..

ie..

*EDIT* sorry this post was made by mistake or sorry double posted..*

i don't think anybody will pull you up abt it if that's just the case :)

the new newbb i think has a delete feature.. again, there might be a setting in newbb to allow deleting of ur own post but i can't remember..