blogs page – sorting problem

Hi there,

I am currently converting my old wordpress site to the new Aqua theme. I noticed that there is a sorting issue on the blogs page. I have already older posts on my site. Aqua is showing an older post as first post/top item.

Example:
May 31,2011
February 23, 2012
November 4, 2011
September 15, 2011
March 28, 2011

If I switch back to my old them where I just disply the ‘category’, the sorting is done properly.

So why is the post from May 31, 2011 not between March 28, 2011 and September 15, 2011?

Thanks a lot and regards
is1302