Recently active topics in PBwiki tagged with administrator

Is there a max number of allowed administrators on one pbwiki site accessing a page at the same time? I have 25 administrators in a training, trying to post comments; some administrators were unable to gain the permissions needed to comment on a page? What would restrict their access, as an administrator, to not allow them to have permission to add a comment?
Thanks....

I got an error message that says this:

[wrong@address.com] is not the email address of this wiki's administrator. At last resort email support@pbwiki.com if you're having trouble resetting your password.

Is there anything else I can try before I email the support people?