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Google just rolled out Penguin 3 so if you have a dubious backlink profile you will most likely have been affected.  You may want to look at cleaning up your backlink profile to get back on track.

More info on the update here:
http://searchengineland.com/google-penguin-3-0-worldwide-rollout-still-process-impacting-1-english-queries-206286

I'd contact the owner of www.sswug.org about the 301 redirect as this may be something that was set up in error if you had been in talks with them.

The http://www.phoenixhollo.com site is displaying a copy of your site in an iFrame so I don't think this is anything to worry about ie. no duplicate content issue.  See here for more info:
http://moz.com/community/q/can-iframes-count-as-duplicate-content-on-either-page

Like others have mentioned you should only have one H1.  This should appear on the page before any other headings such as h2, h3 etc.

The styling shouldn't matter so the h1 doesn't need to be in a larger font size than the h2's.

In this situation it shouldn't be an issue as it isn't a purchased link.  However to be on the safe side you may be best to make the site wide link a no follow. You could place a non site wide link somewhere else on the blog that points back to the main site if you would like to pass some link juice.

You can find a discussion on site wide links here:
http://searchenginewatch.com/article/2340986/Are-All-Sitewide-Links-Unnatural

I don't think it is anything to be too concerned about.

To be on the safe side you could block traffic coming from that referrer:
http://www.htaccess-guide.com/deny-visitors-by-referrer/