Check this: http://www.google.com/search?q=site:gunlawsbystate.com+kansas+gun+laws

The title of the first result is "Kansas Gun Laws - Gun Laws By State". Although, on the page google has cached the title is different:

<title>Kansas Gun Laws - Kansas Gun Law - Reciprocity Guide</title>

Google shows the title that has been on the site 2-3 months ago. Google bot has visited the website a lot of times since that, and as you see it even cached it (the latest version is of 15th Sept), however for some reason it doesn't change the title to the new one in the search results.

We use hash-bang URL structure on this website. It completely meets google's requirements for AJAX websites (_escaped_fragment_ stuff). The issue I explained is happening with almost all hash-bang pages that got indexed.

Questions:

1. Why does it keep old page title in the search results? Can it be connected to the fact that I'm using hash-bang URLs? There are lots of pages on the site that have the same issue, all of them have hash-bang URLs.
2. Another thing I noticed is that Google's "Preview" feature doesn't work for any hash-bang URLs on the site. Did I do anything wrong? It has got cached versions of the pages, why wouldn't it generate a preview?

Thanks (and sorry for my English)

PS. Here's a weird thing I also noticed: this search query https://www.google.com/search?q=Kansas+Gun+Laws+-+Reciprocity+Guide shows the correct title for the same page as in the example above. Why does google show different titles for the same page when you run different queries?