I have started a group blog and people are not receiving the invitations that I send to have them join (maybe blocked by spam filter). I try to re-invite them or to sign them up using the wordpress account that they tell me they've set up but it isn't giving me the option to re-invite them or make them "authors" on the blog, only contributors and they aren't able to post that way. Am I doing something wrong? (This blog is for the non-profit organization that I work for and we are using it to support families so I'd like to get it working soon!)
A few more questions-
Is there a limit on the number of authors on a group blog?
Do people have to enable "cookies" in order to be members of the blog?