Batch Create: Users Role Not Added To Site

I’m using WP 3.2.1.

I’ve added 15 users to a site via Batch Create. I gave them all the role of “Author.”

When I look at the Network Dashboard > Users, I see that each user is associated with the proper site.

However, when I switch to Site Admin Dashboard > Users, it only displays 2 of the 15 users. Yet, the “All” filter at the top of the page has the proper user count by it; the “Authors” filter also displays the proper count at 15. Yet, all 15 users do not appear in the Users list.

Upon login, the users that are not displayed in the Site Admin Dashboard > Users, receive a notice “You do not have sufficient permissions to access this page.” This means they aren’t being treated as “Authors” because they can’t access the dashboard to manage their posts.

I’ve tried deleting the users and re-creating them, but it has no effect.

Does anyone have any suggestions?