Sam, this is probably a pure HTML question, not an Ajax question. in your <table> tag set border="1" to show the borders - set to "0" to remove them and then what you actually have will become a lot clearer.

Code:
<table border="1">
You will probably see that you have all of the table cells <td> in your code example in the same row <tr> where you probably want the offending one in a separate row. At least it looks that way, kind of hard to tell from the screen shot but you only have the one <tr> tag in the code.

You don't say what you are trying to make smaller. The CVC control or everything on the page? To make smaller you would need to either change the CSS or add a style property to the input control. Again, this is maybe not Ajax but an HTML question though the Ajax framework does make extensive use of CSS. If you attempt to change the CSS you run the risk of affecting everything and the preferred method would be to override rather than change the original but this can get lengthy to explain when I'm not sure of what you're trying to do. If only the one control then the style attribute might be best.