Why wont my CSV Layers .show()

[CharlesGant]

I have a series of functions that create CSVLayers, add them to the map, remove them, and refresh them.  See below.  However, when the refresh script is called the data is created/updated, but the .show() will not show the layers that are called.  Can anyone explain this?

var csv60min;
var csv60mintextLayer;
function csv60minfunc () {
csv60min = new CSVLayer("symGSPHydroViewer/data/60query.csv",{id:"csv60min"});
csv60min.on("update-end", function(results){
    csv60mintextLayer = new GraphicsLayer({id:"csv60mintextLayer"});                   
    arrayUtils.forEach(results.target.graphics, function(feature, index){
        var lid =  feature.attributes.lid;
        var name =  feature.attributes.name;
        var value = feature.attributes.value;
        var ffg = feature.attributes.ffg;
        var ratio = feature.attributes.ratio;
        var validtime = feature.attributes.obstime;
        var attr = {"Location ID":lid,"Location Name":name,"Obs Value":value,"FFG":ffg,"Ratio of FFG":ratio,"Obs Valid Time":validtime};                                                                              
        var geom = feature.geometry;
        var displayText = feature.attributes.value;
        var font = new Font("12pt",Font.STYLE_NORMAL, Font.VARIANT_NORMAL,Font.WEIGHT_BOLD,"Helvetica");
        var textSymbol = new TextSymbol(displayText,font,new Color("#FF0000"));                       
        csv60mintextLayer.add(new Graphic(geom, textSymbol, attr));});                       
    var infoTemplate = new InfoTemplate("Attributes", "${*}");       
    csv60mintextLayer.setInfoTemplate(infoTemplate);
    map.addLayer(csv60mintextLayer);
    csv60mintextLayer.hide();
});                               
var blank = new Color([0, 0, 0, 0]); // hex is #ff4500
var marker = new SimpleMarkerSymbol("solid", 0, null, blank);
var renderer = new SimpleRenderer(marker);
csv60min.setRenderer(renderer);
map.addLayer(csv60min);
csv60min.hide();
}

function getVisibleCSVs(){
var visiblelayers = [];
var CSVlayers = [csv60min,csv60mintextLayer];
for (index = 0; index < CSVlayers.length; ++index) {
        templayer = CSVlayers[index];
        if (templayer.visible) {
        console.log("VISIBLE: " + templayer.id);
        visiblelayers[visiblelayers.length] = templayer
        }
    }
// console.log("VISIBLE Layers: " + visiblelayers);
return visiblelayers
}

function RefreshCSVLayers(){
    console.log("Refreshing CSV Layers");
    visiblealt = getVisibleCSVs()   
    console.log("VISIBLE ALT: " + visiblealt);

    map.removeLayer(csv60min);
    map.removeLayer(csv60mintextLayer);
   
    if (visiblealt.indexOf(csv60min) > -1){
    console.log("YES");
    csv60minfunc();
    csv60min.show();
    csv60mintextLayer.show();
    }