I am using WordPress SEO by Yoast plugin to control duplication of Categories, Tags, Pagination and comments (?replytocom) etc.
I've set the plugin correctly by:
1# Noindexing sub pages
2# Noindexing Categories and Tags
But everything in vain. 100s of duplicate pages are still being produced by my WordPress software.
Just perform a site command in Google, like site:seohour.com inurl:?replytocom
Check out the results here
Is there any problem with Yoast Plugin?