Remove the "float:left" cause that makes the table, uh, float to the left. It also makes the space it occupies collapse unto itself which is why the second table rises up to occupy that space.
Additional note. Modern web pages require a doctype. Right now, without one, you are in "quirks mode" and it's like 1999 all over again. Add this as your first line:
That will put you in "standards mode" and will make IE attempt to perform like the other far more modern browsers.