Problem with icon box hover

Hi!
I was working on my iconbox styling and somehow i did sth wrong. the title now has a hover that displays another white box with the title on hover. where is my mistake? how can i fix this???? thx!

/*allgemeiner Zeilenabstand*/

body, body p {
line-height: 1.4em;
}

/*Aufzählungzeichen in Eckig*/
ul.disc, .entry-content-wrapper ul {
list-style: square outside;
}

/*Bild Positionierung bei Team Mitglied */

.team-img-container img {
  margin: 0 0 !important;
  align: left;
}

/*Abstand special headings nach unten*/

.av-special-heading { 
	padding-bottom: 20px !important; }
	

/*spezielle überschrift linie entfernt */

.special-heading-border {
    display: none;
}

/*Fusstext */

.fusstext{
font-size: 11px !important;
font-style: italic;
}

/* icon liste farbe von icons */

.alternate_color .avia-icon-list .iconlist_icon {
background-color: #df6e1f; font-size: 26px;
}

/* icon list text farbe und groesse */

 .alternate_color  .avia-icon-list p {
color: #2e577e; font-size: 12px;
}

.main_color  .avia-icon-list a {
color: #2e577e; font-size: 12px;
}

.iconbox_content_title { 
color: #666 !important; 
}

/* icon list Hintergrund  und Box */
.iconbox {
background-color: #f8f8f8 !important;
padding: 10px;
border-style: solid;
border-width: 0.5px;
border-color: #666;
}

/* Katalog Schriftgrösse, keine Großbuchstaben und Hover Farbe */

.av-catalogue-title{ 
font-size: 13px; 
font-weight: bold !important; 
}
a:hover .background_catalogue {
color: #df6e1f !important;
}

.av-catalogue-content { 
font-size: 13px !important; 
}

.av-catalogue-title {
text-transform: none !important;
} 

/*Catalogue ohne Trennlinien */

ul.av-catalogue-list, .av-catalogue-list li {
    border: none;
}

/*Catalogue Bildergröße */
.av-catalogue-image 
{border-radius: 0px; width:50px; float:left; margin-right:15px; }

/* accordeon farbe */

.vert_icon, .hor_icon {
  border-color: #df6f1f!important;
}

/*Footer Schriftgroesse, Absatz und Farbe*/

#footer .textwidget  {
    font-size: 11px !important;
	color: #ffffff !important; 
	line-height: 1.2em;
}
#footer .widgettitle  {
    font-size: 13px !important;
	color: #ffffff !important; 
}

/*Footer Bild Groesse*/

#footer #avia_partner_widget-3 img {
    width: 80px!important;
    height: 80px!important;
} 

/*Footer Hoehe */

#footer{
bottom: 0;
margin-top: 100px;
z-index: 999;
font-size: 9 px !important;
text-align: bottom;
background-color: #2e577e !important;
}

/*Footer Hover Farbe*/

#footer a:hover {
    color: #df6e1f !important;
}

/*Socket Background */
.socket_color
{background-color: #df6e1f !important;
}

/*Socket Menu Links Hover Farbe*/

#socket a:hover {
    color: #666 !important;
}

/*Socket Menu einblenden auf mobilen Geräten*/

@media only screen and (max-width: 768px) {
.responsive #socket .sub_menu_socket {
  display: block !important;
}}