Anonymous Function Variable Scope Issue

I'm confused by this?!?!? IF I run the following test code, the variable "loadCode" gets changed to "true" by the setTesting function

(function () { 
     var loadCode = false;
	 
	setTesting = function (){
	    loadCode = true;
		return true;
	};
	
	if (!setTesting()){
       console.log("not in test mode");
	}
	
	if(loadCode){ 
		console.log("in TEST Code");
     }
})();

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Now if I run this code below, the variable "loadCode" switches back to false after leaving the setTesting function and I don't understand why? What am I missing?

(function () { 

    var loadDTM = false;
    var testDTM = false;
		
	setTesting = function (){
	    if (localStorage.getItem("testdtm") || -1 !== location.href.indexOf("#testdtm")){
	        localStorage.setItem("testdtm", !0);
		    testDTM = true;
		    loadDTM = true;
			return true;
	    }
		
		if (localStorage.getItem("testsample") || -1 !== location.href.indexOf("#testsample")){
	        localStorage.setItem("testsample", !0);
		    testDTM = false;
		    loadDTM = true;
			return true;
	    }
		
		var loadDTM = false;
	    var testDTM = false;
		return false;
	};
	
	if (!setTesting()){
     console.log("Not in testing");
	}
	
	if(loadDTM){ 
	    console.log("in DTM load");
 	}
})();

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