I went to create a sitemap of my site in order to improve my SEO. The problem is that when I create the sitemap it only finds a small fraction of the pages that are available. I used bot xml-sitmaps and WonderWebWare SiteMap Generator and both gave me similar results.

I also tried using the SEO Moz crawl test and it only finds a limited number of pages as well.

I built this website from the ground up with SEO in mind and I'm using ZenCart with a SEO add on that transfers the .php addresses to custom .html addressees.

What am I doing wrong?

Website is www.computechracing.com