Forum:Weird stuff happens when I use a specific bit of code

Why is it that when I use the following line of code in an article: it makes the page behave strangely?--User:Nequillim 20:16, October 3, 2009 (UTC)
 * Are you closing the td tag? Mark (Tedjuh10) - Talk 20:22, October 3, 2009 (UTC)
 * No, I suppose I'm not. Though it moves the entire left 'navigation bar' of a wiki. I've never seen code move that before. Is it normal? --User:Nequillim 20:40, October 3, 2009 (UTC)
 * You have two table tags and a end table tag, you need one more  and you must remember to close all tags that need to be closed! Can we see a link?   ~Joey~   ^Talk^  20:44, October 3, 2009 (UTC)

Tables should generally look like this:  --Michaeldsuarez (Talk) (Deeds) 16:22, October 4, 2009 (UTC)