I can confirm this happens when you use SnowFlat and check the Show separate up and down votes setting in admin/viewing. Please, create a ticket in the GitHub repo linking to this question.
A quick workaround would be to add this CSS code to your qa-styles.css file:
span.qa-upvote-count, span.qa-downvote-count {
line-height: 30px;
font-size: 81%;
display: block;
}
You may have to play a little with the font-size percentage.
