Post Comment misaligned

Hi, I’ve recently begun to use wordpress and wanted to try to get it as professional looking as possible. Although for some reason, the “Post Comment” button is slightly misaligned.

I’ve looked everywhere and tried everything but nothing seems to fix it and there’s no documentation on it either. Also I’ve reinstalled the wordpress theme and there was no change. If someone could help fix this for me it’ll certainly relieve my headache.

Here’s a like to my webpage and a screenshot in question, this misalignment occurs also in IE, Firefox and chrome:

Screencap: http://www.dei-ex-machina.com/wp-content/uploads/2013/03/wordpress1.png

Site: http://www.dei-ex-machina.com/

Also if anyone knows any plugin that would allow me to change the navigation menu/color that would be great, thanks!

[No bumping. If it’s that urgent, consider hiring someone.]

[Second bump deleted too]