Be careful doing that. The node system, whereby nodes are side by side except the last odd node, was a very complex bit of code I wrote. All CSS. I googled thoroughly how to accomplish side by side list items easily but to no avail. As far as I know, this is the only system this advanced around.
If you force the width to be 100%, don't expect all the nodes to follow suit and behave as they would normally. If you do force one, I'd always force an even number, as in the screenshot above. If just one is forced, I think it could break the table.
And of course, take note, this is not an HTML <table>, it is still an <ol> <li> system. If it were a table, this would be cake. I welcome anyone interested at looking at my code and improving upon it.