Static posts page not working

I'm using Atahualpa 3.6.4 and have specified a static home page and a static posts page. The home page works fine, as do all the other pages except the static posts page. When I click on the page designated as the static posts page, I get a completely unformatted version of the home page. If I switch to Twenty-Eleven everything works as expected, i.e. the few existing posts show up on the page designated as the static posts page. So, the problem is obviously a "feature" of 3.6.4.

I have applied all the bug fixes and disabled all plugins and the problem persists. Is this a known issue, and if so, is there a workaround?

http://chontest.com/hvpa

The Announcements/Surveys page is the one designated as the static posts page under Settings | Reading.