Text will not wrap around image

It is due to the CSS:

.pibfi_pinterest {
	position: relative;
	display: inline-block;
}

that is being output by the plugin that is adding the Pinit styles:

Plugin Name: Pinterest Pin It Button For Images
Plugin URI: http://ww.wp.xz.cn/plugins/pinterest-pin-it-button-for-images/
Author: Canha
Author URI: http://www.canha.net

Try deactivating that plugin and see. You can override the styles in a Child Theme, a theme provider Custom CSS option, or a Custom CSS plugin.

To discover what CSS is output by your theme, use a web inspection tool such as Firebug: http://getfirebug.com/ , Chrome Inspect Element: https://developers.google.com/chrome-developer-tools/ or Internet Explorer 9+ F12 Dev. Tools: http://msdn.microsoft.com/en-us/library/dd565627(v=vs.85).aspx#csstool

There are others.

When editing CSS, use a Child Theme
http://codex.ww.wp.xz.cn/Child_Themes
Custom CSS Plugin, or Theme provided custom CSS option.
Edits to parent themes are lost on theme update.

Learn CSS: http://www.w3schools.com/css/