Re: Two different questions
Wiki page names must be unique. You can have only a single page named American Dream. However, you can use identical text descriptions for different pages. For example, you can have:
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((American Dream)) ((My American Dream|American Dream)) ((Rick's Dream|American Dream))
They will all link to different (unique) pages, but the end user will see the 3 links as the same: American Dream. Please see the docs for details.
For access, it is not enough to simply enable a specific features. You need to set the permissions for each group, in order for users to access the feature. You'll need to set the correct permissions for the Anonymous and Registered groups (and any other groups have have created). Please see the docs for details.
HTH,
-Rick
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