Merge branch 'dev' of https://github.com/terminusdb/terminus-client into dev

Author: Cheukting

lib/woql.js

@@ -822,9 +822,11 @@ WOQLQuery.prototype.setStart = function(start){
 }
 
 WOQLQuery.prototype.addStart = function(s){
-	if(this.hasStart("start")) this.setStart(s);
-	var nq = {'start': [s, this.query]};
-	this.query = nq;
+	if(this.hasStart()) this.setStart(s);
+	else {
+		var nq = {'start': [s, this.query]};
+		this.query = nq;
+	}
 	return this;
 }