Blocks not respecting region settings

I’ve built a small, barebones site for a local prayer group, using the Open Outreach distro of Drupal 7, and I want to re-arrange the blocks in the sidebar-second region so that the announcement of the next meeting time and place is at the top. The problem I’ve run into is that I can’t move the user login blocks. When I clicked on it to edit it, it said it wasn’t assigned to a region. I tried assigning the login block to the leaderboard region, and the result was that the login block now appeared in both sidebar-second and leaderboard. I set the login block to be hidden, and it persisted in the sidebar-second region.

Is this an issue with the Open Outreach theme? Is there a way to fix it? I’ve tried Googling, but searching about blocks in multiple regions just gets you people trying to make one block appear in multiple regions, which is what I want to stop.

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