Three mobile menu icons, but only one menu active for a page …

Hi there! In mobile view I am offered three icons, two of them opening an empty side menu ... since only one menu is installed. To make things worse, the homepage menu is different from all other pages so once visitors have found out the correct one of the three on the homepage they have to search again for the right one on the other pages. Pls check out www.jovo-soft.de thx! jo