diff --git a/htdocs/core/actions_massactions.inc.php b/htdocs/core/actions_massactions.inc.php
index 64578ad68bb..b70e17b2ebb 100644
--- a/htdocs/core/actions_massactions.inc.php
+++ b/htdocs/core/actions_massactions.inc.php
@@ -635,6 +635,7 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 
 	$TFact = array();
 	$TFactThird = array();
+	$TFactThirdNbLines = array();
 
 	$nb_bills_created = 0;
 	$lastid= 0;
@@ -685,6 +686,7 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 				$lastid = $objecttmp->id;
 
 				$TFactThird[$cmd->socid] = $objecttmp;
+				$TFactThirdNbLines[$cmd->socid] = 0; //init nblines to have lines ordered by expedition and rang
 			} else {
 				$langs->load("errors");
 				$errors[] = $cmd->ref.' : '.$langs->trans($objecttmp->error);
@@ -774,6 +776,11 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 
 						$objecttmp->context['createfromclone'];
 
+						$rang = $lines[$i]->rang;
+						//there may already be rows from previous orders
+						if (!empty($createbills_onebythird))
+							$rang = $TFactThirdNbLines[$cmd->socid];
+
 						$result = $objecttmp->addline(
 							$desc,
 							$lines[$i]->subprice,
@@ -791,7 +798,7 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 							'HT',
 							0,
 							$product_type,
-							$lines[$i]->rang,
+							$rang,
 							$lines[$i]->special_code,
 							$objecttmp->origin,
 							$lines[$i]->rowid,
@@ -806,6 +813,8 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 						);
 						if ($result > 0) {
 							$lineid = $result;
+							if (!empty($createbills_onebythird)) //increment rang to keep order
+								$TFactThirdNbLines[$rcp->socid]++;
 						} else {
 							$lineid = 0;
 							$error++;