Not a mod, but in the AO3 posting interface (shown in the pic below), if you scroll down, you'll see a section called 'Associations.' In that section, there will be a field titled 'Post to Collections/Challenges.'
You can type 'poetry' in the field, and Poetry Fiction 2011 will be one of the options. Select Poetry Fiction 2011 and then when you're ready to post, your story will appear in the collection. Hope this helps! ^_^
Alternatively, if you haven't already posted your fic to AO3, you can go to the Poetry Fiction 2011 AO3 Collection and click the 'Post To Collection' button in the top, right-hand side of the page.
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You can type 'poetry' in the field, and Poetry Fiction 2011 will be one of the options. Select Poetry Fiction 2011 and then when you're ready to post, your story will appear in the collection. Hope this helps! ^_^
Alternatively, if you haven't already posted your fic to AO3, you can go to the Poetry Fiction 2011 AO3 Collection and click the 'Post To Collection' button in the top, right-hand side of the page.