Extra buttons obscures text

I like this plugin and use it on lots of projects. I have a problem with it. The extra buttons that the plugin adds to the editor hides the text. When the screen is narrow enough to cause the buttons to break to a new line the text becomes obscured. See this screen capture: https://dl.dropboxusercontent.com/u/10065352/highlight-bug.jpg

https://ww.wp.xz.cn/plugins/html-editor-syntax-highlighter/