I noticed that about you site when I first saw it, but I didn't bother to look at the code to see whether you were using tables or not.
I don't know if DW allows this, but when I need to make a table that is the same as the one on another page, I just copy and paste it from one page to the other in layout view. That way, I only need to get it right once.
Generally, I would advise that you to be very conscientious with table settings - double check them all on a regular basis. I don't know much about how DW works, but my software gives all the parameters for evey cell, row and column. If DW applies any automatic settings, change them to their pixel values to fix each row and column. Don't make the table too complex; it can knock the formatting right out of left field if you're not careful.