Right , the cause of this, that i found anyway , lies in
how the actual html pages are formatted .
Shared borders are the only border panels permitted if you're using shared borders
The use off lay out tables on the actual html page must be done either very carefully with regards to the width dimesions, or avoided altogether. the width of the actual page + the shared borders cannot exceed the total width of the page, in page setup
even when the width value of shared border left +right + actual html page is less than the total page width, it still messes up,
which is why I gave up on shared borders for future developments an moved on to Frontpage 2003 where I use web templates, far more useful
I got the web site working, but as I said, I moved on sharpish from fp2002
Your problem might be different, but good luck