Search Engines not recognizing Blog Posts vs Pages All in One SEO Pack Troubleshooting Forum

I posted this question on a forum for BUILDER, the theme I used to create my website, and was directed here to help solve this problem – so hopefully now I'm in the right place!

I have a website with pages (main website content) and posts (blog). [ http://www.altnyc.org ] All is set up and working well, except search engines are not picking up new posts as posts. On previous simple blogs I have had, a new post would be picked up by google immediately, and this was with free themes and no advanced SEO – so I feel like I've done something to screw this up! Note – I run a non-profit organization – I am not a web designer by trade and am not super tech savvy, so any help solving this issue is greatly appreciated!

Here are some of the key settings I have right now:

Under Privacy Settings, 'I would like my site to be viable to everyone…' is checked.

I have installed enabled All in one SEO, and entered in specific home title, home description and home keywords.

Canonical URLs and Rewrite Titles are both checked off.

Post Title format is: %post_title% | %blog_title%

Page Title format is: %page_title% | %blog_title%

Category Title format is: %category_title% | %blog_title%

Archive Title format is: %date% | %blog_title%

Tag Title format is: %tag% | %blog_title%

Search Title format is: %search% | %blog_title%

Description format is: %description%

Use categories for META keywords is checked

Use tags for META keywords is not checked (as I don't currently use tags on the blog)

Use noindex for categories is NOT checked

Use nonindex for archives is checked

No pages are excluded

ON BLOG POSTS: The All in One SEO pack information shows at the bottom of each screen, and I've filled in appropriate titles, descriptions and keywords – all that I assume should assist with SEO.

Am I missing something? Is there something specific about the theme that could be interfering with the search engines' ability to pick up new blog posts as posts? (I can look at the source code on the website, but unfortunately, it is all greek to me!) I'm inclined to think it's my error and not the software! The most recent post I made was on June 10, 2010. The content is fairly specialized (about new opera and a specific new opera that was premiering). When I do a blog search on google with the search term "golden ticket opera" (which is incredibly specifc to that post), the post does not show up at all in the search. Even when I do a blog search by the title of the post it does not show up.

BUT when I do a general web search of the title of the post title in quotes ( "Leading up to the premiere"), it is the first thing that comes up.

So obviously it was indexed by google, but it doesn't recognize it as a blog post. HOW do I fix that?? I want to make sure that as I blog more in the future, those posts are indexed in a timely fashion as blog posts.