Very weird. This may be something to take up directly with Contact Form 7, but I noticed you are inserting the shortcode in a text module. Can I have you try inserting the shortcode in an HTML module for testing purposes?
On these contact buttons, you can use CSS Hero to adjust the margins. I was able to activate CSS Hero, target each button and apply some margin to get them lined up. Give that a shot and let me know how it goes!