Increasing the multiplier (duplication?) test element for compliance

When I open a new window (even), every odd window stops working, and test ": visible" begins to be duplicated on the number of open windows ([1 -> 1], [2-> 2] etc).

Code:

$('.back_sc_grad').on('click', function(){
    cn = $(this).attr('d-cat');
    console.log(cn);
    if( $('.container div#cat'+cn).is(':visible'))
    {
        $('.container div#cat'+cn).css('display','none');
        $('#shortcuts .shortcut.open').removeClass('open').addClass('run');
        activew = cn;
        allhide = 1;
    }else{
        change_window(cn);
        reactivate_shortcuts(cn);
        activew = cn;
        allhide = 0;
    }
});

Video of the error: YouTube