Problem with canonical tags likely related to all in one SEO pack plugin

I don’t know how to fix (remove) this canonical tag issue, which is resulting in duplicate content. See below. I have lost over 200 of my major rankings and 80% of my traffic most likely from this. I have no actual Google penalty notification.

http://www.compressionstockingssite.com/index.php/tag/compression-socks/
<link rel=”canonical” href=”http://www.compressionstockingssite.com/index.php/tag/compression-socks/&#8221; />

http://www.compressionstockingssite.com/index.php/tag/graduated-compression/
<link rel=”canonical” href=”http://www.compressionstockingssite.com/index.php/tag/graduated-compression/&#8221; />

Same page using article tag: http://www.compressionstockingssite.com/index.php/tag/maternity-compression-stockings/
Ditto: http://www.compressionstockingssite.com/index.php/tag/support-socks/
Ditto: http://www.compressionstockingssite.com/index.php/tag/running-socks/
Ditto: http://www.compressionstockingssite.com/index.php/tag/compression-socks/
Ditto: http://www.compressionstockingssite.com/index.php/tag/compression-hosiery/
Ditto: http://www.compressionstockingssite.com/index.php/tag/graduated-support-hosiery/
Ditto: http://www.compressionstockingssite.com/index.php/tag/athletic-compression-socks/
Ditto: http://www.compressionstockingssite.com/index.php/tag/maternity-compression-stockings/
Ditto: http://www.compressionstockingssite.com/index.php/tag/graduated-compression/
Ditto: http://www.compressionstockingssite.com/index.php/tag/fashionable-compression-stockings/

So far I have removed the tag cloud and the monthly date archive for the posts

I have updated and checked my all in one seo pack plug in and have the following settings activated – relating to potential duplicate content – ….

– I have activated “canonical URLs” in the general settings
– I have activated the “noindex” settings for categories, date archives, author archives and the tag archives
– I have activated “remove descriptions for paginated pages” under advanced settings

Can somebody please help and offer suggestions on what else I can do.

Thank you.