XML parsing error? Repetition

[gilgalbiblewhee]

I don't understand but my XML is repeated as I parse it with AJAX. There is a repetition (x2) of nodes:
http://205.205.200.231/~h806209/blog.xml

		<script type="text/javascript">
			function parseXML(){
				try //Internet Explorer
				{
					xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
				}
				catch(e)
				{
					try //Firefox, Mozilla, Opera, etc.
					{
						xmlDoc=document.implementation.createDocument("","",null);
					}
				catch(e)
					{
						alert(e.message);
						return;
					}
				}
			xmlDoc.async=false;
			xmlDoc.load("blog.xml");
			//document.getElementById("biotext").innerHTML=xmlDoc.getElementsByTagName("blog7708")[0].childNodes[0].nodeValue;
			blogXml= document.getElementById("picbar");
			var m;
			var months = new Array();
			months[0] = "January";
			months[1] = "February";
			months[2] = "March";
			months[3] = "April";
			months[4] = "May";
			months[5] = "June";
			months[6] = "July";
			months[7] = "August";
			months[8] = "September";
			months[9] = "October";
			months[10] = "November";
			months[11] = "December";
			
			for(m=0; m<months.length; m++){
				if(xmlDoc.getElementsByTagName(months[m]).length > 0)
					for(i=0; i<xmlDoc.getElementsByTagName(months[m]).length; i++){
						blogXml.innerHTML+="<span style='font-weight: bold; font-family: Verdana, Arial, Times New Roman; border: 1px solid #BCB2B3; display: block; background-color:#FFFFAE; padding: 5px;'>"+ months[m] + " " + xmlDoc.getElementsByTagName(months[m])[i].getAttribute("date")+ ", " + xmlDoc.getElementsByTagName("year")[0].getAttribute("number")+"</span>";
						blogXml.innerHTML+="<br /><br />";
						blogXml.innerHTML+="<span style='font-weight: normal; font-family: Verdana, Arial, Times New Roman; display: block; padding: 10px;'>" + xmlDoc.getElementsByTagName(months[m])[i].childNodes[0].nodeValue+"</span>";
						blogXml.innerHTML+="<br /><br />";
					} // endfor i
				} // endif
			} // endfor m
			</script>

<div id="picbar" style="clear: left; margin: 0px 0px 10px 0px; border: none; background-color: #FFCC00; width: 200px; min-height: 390px; overflow-y: scroll;"></div>