Hi Alan,
Those features do exist, but it sounds like there's a misunderstanding on how they work / where to find them. Specifically, here's a few things to clarify:
1) Only Site Administrators can add new Users (Login -> Administrative sidemenu -> Access Control -> People). Community Administrators cannot add new accounts, but can give existing accounts permissions within their Community.
1a) However, depending on local settings, individual users often can register with DSpace. This allows individuals to create their own account. But, this account has no special permissions until an Administrator gives them permissions (by adding them to a role/group).
2) Community Administrators *only* have Administrative rights under (one or more) specific Communities. So, this means they can only create subcommunities or collections under those specific Communities. On the demo site, the demo Community Admin can only create Collections under the "Sample Community" (
http://demo.dspace.org/xmlui/handle/10673/1). So, after logging in as the demo Community Admin, if you go to that Community, on the sidemenu you'll see a new "Context" menu in the sidebar with an option that says "Create Collection".
2a) It's worth noting that a Site Administrator can Create a Collection under any Community. They can also create new Communities and assign Community Admin rights within them. But, again you must first browse to a Community to create the Collection under. DSpace has a strict hierarchy of Community -> Collection -> Item -> Files.
I hope that helps explain these features a bit more, Alan. Definitely let us know on this list if you have other questions that pop up.
- Tim