Strange Script changing full width button on save/update

When I have finished editing a full width button, with email contact link and save it and go back into the back end, the formatting has changed (two crotchet icons instead of an envelope, colours change) and a script has been inserted into the Additional Description – see below

Any ideas why this is happening?

<script data-cfhash=’f9e31′ type=”text/javascript”>/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName(‘script’),e=t.length;e–;)if(t[e].getAttribute(‘data-cfhash’))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute(‘data-cfemail’)){for(e=”,r=’0x’+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+=’%’+(‘0’+(‘0x’+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>?subject=Website Enquiry’ link_target=” icon_select=’yes-right-icon’ icon_hover=’aviaTBicon_hover’ icon=’ue854′ font=’entypo-fontello’ custom_font=’#ffffff’ color=’custom’ custom_bg=’#00a650′ color_hover=’custom’ custom_bg_hover=’#95cc9c’ admin_preview_bg=”]
01753 644588 / [email protected]<script data-cfhash=’f9e31′ type=”text/javascript”>/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName(‘script’),e=t.length;e–;)if(t[e].getAttribute(‘data-cfhash’))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute(‘data-cfemail’)){for(e=”,r=’0x’+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+=’%’+(‘0’+(‘0x’+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script>