Hi Jean:
How does this look on my test wiki page[1]. If it look OK just choose "Source" on the WYSIWYG editor and copy/paste the code into your wiki page. It looks like the problem is that your tables were set to "left" and I just changed them to "not set" in the WYSIWYG editor.
Hope this helps.
Cheers
Marc
[1] http://wiki.documentfoundation.org/Marketing/DeleteMeLater
Thank you!