JQGRID Frozen columns - Duplicating information [closed]

I am using the frozen column option, as it is in the documentation, as follows:

 jQuery(grid_selector).jqGrid({
       url:urllst,
       datatype: 'json',
       height: 'auto',
       width: 'auto',
       ignoreCase: true,
            colNames:['UF','Macro região','Região','Cód.Municipio','Nome','População','Cód.Status','Cód.Perfil','Partido Prefeito','Partido Vice','Ativo ?' ],   // PONTO DE ALTERAÇÃO
            colModel:[ // PONTO DE ALTERAÇÃO
                {name:"uf",index:"uf", width:100, sorttype:'text', viewable: true, frozen: true,
                    stype:'text',
                    formoptions:{elmprefix:'*', label: 'UF:', rowpos:1, colpos:1},
                    editable:true,
                    editrules: {required: true},
                    edittype: 'custom',
                    classes: 'c',
                    editoptions: {style: "text-transform: uppercase",
                        'custom_element' : macro_uf_element,
                        'custom_value'   : macro_uf_value,
                    },
                    searchoptions: {
                        sopt:['eq','ne','lt','le','gt','ge','bw','in','ni','ew','en','cn','nc']
                    }
                },

and soon after:

rowNum:11,
rowList:[10,20,30],
caption: "Frozen Header",
shrinkToFit: false,
jQuery(#TABELA).jqGrid('setFrozenColumns'); 

The "freeze" works, but the data gets duplicated, one over the other in the scrolling, so I set the background with css, but in that case hover and selection will not work on frozen columns.

Photo: