Do stats tables neec class=grid?

So I'm looking at the CSS classes used on Dreamwidth and from what I can see, the site stats tables (and especially the Paid accounts table near the bottom of the page) may need to use class grid (which I think is defined differently for each site scheme?) in addition to (or instead of) class stats-matrix (defined in htdocs/stc/sitestats.css.

Am I correct?

If it needs to keep both classes, what (if anything) needs to change or go away in class stats-matrix to prevent conflicts or redundancy?