Takayuki Miyoshi on "[Plugin: Contact Form 7] 3 Form Fields on one line"

The problem is the container is narrow and the input fields are wide. Three fields can't fit in the width of the container. Edit your theme's stylesheet to adjust them.

http://tsrcinc.net/wp-content/themes/TSRC/lib/media/css/styles.css
Line #2337

div.wpcf7, .small-form {
    width: 400px;
}

http://tsrcinc.net/wp-content/themes/customFramework/lib/media/css/main.css
Line #1000

input, .input, select, textarea, .field-container {
    width: 100%;
}