An issue with register_sidebar and the admin interface

Looks like the problem is with the id‘s.

Try putting some unique names.
For example, this doesn’t works in TwentyEleven, as it registers a sidebar with the same ID:

'name' => __('Main Sidebar'),
'id' => 'sidebar-1',

From the Codex:

id – Sidebar id – Must be all in lowercase, with no spaces (default is a numeric auto-incremented ID).

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