weird symbols on floating social

I have just installed Floating social, and I get some weird symbols next to the icons, bot on it's vertical and it's horizontal form.

http://imageshack.com/i/f7gdn8p

http://imageshack.com/i/075h9vp

My site is http://www.pcsteps.gr. This is a sample post that contains the plugin: http://www.pcsteps.gr/1348-stamatiste-ta-skoupidia-sto-timeline/