All in one SEO not consistent in meta tags

For some reason there are pages that work OK and others that don’t. Some pages have two sets of meta tags for keywords and descriptions, with one set being blank like:

<meta name=”keywords” content=”” />
<meta name=”description” content=”” />

The site is hd-report.com and if you look in the source for a few of the pages all the meta tags are inconsistent – even though they are filled in correctly on each post.

Anyone have an idea what could be going on? Is the plug-in retroactive for older posts?