The Errors indicated by the HTML validator appear to be mostly optional or unnecessary items that will not affect your page performance and are only suggested guidelines. You can spend all day hunting them down and run different validators with different results and go crazy going in circles with some of those recommendations.  One place will recommend one change which will upset the validator at another place. We suggest not to worry about this section so much since you are using a site builder and do not have control over all of the HTML display code.

The errors on your site are not pertinent to your site search engine ranking.  Your site is written with the server side language Coldfusion and thus is not 'validated' by a number of validation sites.  At this point it is topical to note that even major browsers (Netscape, Mozilla, Opera, Explorer, etc.) do not have a defined HTML or other web languages standard.  Therefore, it is very unlikely that any one validation site or company will be able to 'fix' your site or more importantly be able to single out 'errors'.

That is a very common sales solicitation, and in 99% of the cases it is a scam. If you research on Google you will find many complaints related to similiar sales tactics.

Getting a call or email about your site doesn't mean anything is actually wrong with your site. You could use their service and get a call from another one of their sales reps 3 months later telling you the same thing all over again. According to these companies, everyone's site is bad. They prey on the fact that most people are not knowledgable about certian aspects of their site, and therefore do not understand what to do.