Each analyzer gives different results and I don’t believe any of them are completely accurate. Some are not accurate due to the tool being outdated and not kept up with SE’s, but some are meant to be out dated so you hire the company to fix your issue.
The Title is what you want to be concerned with rather than description or keywords tags. Description is good for putting copy that is meant to make a searcher click your link. Meta tags do not hurt your site, so it is not bad to use them for the search engines that still use them or look for them.
Spend a lot of time in forums and on blogs learning about SEO and you will see that it is much more complicated than just meta tags.
Good luck with your site, you should keep us all updated on your progress.