Extra Space

I use a template for uploading my stories to a website. The template is basically a table with cells for different functions like the header, graphic, story text, reader reply etc. If you look at the screenshot you will see another what looks like a table with a blue highlighted border surrounding my table (my table is the grayed-out area). When displayed in a browser it shows up as extra space to the left  and bottom and I can't seem to manipulate it to make it the same size as my table.

Thanks

Alan