Like most validation tools, they’re only accurate and useful to a point. Visually, a website might be perfectly responsive, but to the Google crawler it might be looking for signals that generally imply mobile support that aren’t being used.
Trust your own eyes and judgments over an automated tool when it comes to these kinds of issues. When the real mobile devices aren’t handy, tools like this are fairly good:
http://quirktools.com/screenfly/
This should fix your header:
#logo {
width: 100% !important;
}As for your table, the way the table is assembled it doesn’t look like it’ll be able to be responsive. Since this is a bit off-topic, go ahead and start a new topic and we’ll work on a better solution for displaying your products.
Thank you.