diff --git a/ChangeLog b/ChangeLog
index eab9834e9c8..a11e8f68ec4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -119,6 +119,7 @@ Fix: [ bug #1306 ] Fatal error when adding an external calendar.
 New: Added es_CL language
 Fix: Margin tabs bad data show
 Fix: [ bug #1318 ] Problem with enter key when adding an existing product to a customer invoice.
+Fix: [ bug #1388 ] Wrong date when invoicing several orders
 
 ***** ChangeLog for 3.5 compared to 3.4.* *****
 For users:
diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index 146d9e777c2..b96ea931f21 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -1362,7 +1362,7 @@ class Commande extends CommonOrder
                 $extralabels=$extrafields->fetch_name_optionals_label($this->table_element,true);
                	$this->fetch_optionals($this->id,$extralabels);
 
-                $this->db->free();
+                $this->db->free($result);
 
                 /*
                  * Lines
diff --git a/htdocs/commande/orderstoinvoice.php b/htdocs/commande/orderstoinvoice.php
index aa2883ccb96..7b79a16bec1 100644
--- a/htdocs/commande/orderstoinvoice.php
+++ b/htdocs/commande/orderstoinvoice.php
@@ -413,7 +413,7 @@ if ($action == 'create' && empty($mesgs))
 
 	// Date invoice
 	print '<tr><td class="fieldrequired">'.$langs->trans('Date').'</td><td colspan="2">';
-	$html->select_date(0,'','','','',"add",1,1);
+	$html->select_date('','','','','',"add",1,1);
 	print '</td></tr>';
 	// Payment term
 	print '<tr><td class="nowrap">'.$langs->trans('PaymentConditionsShort').'</td><td colspan="2">';
diff --git a/htdocs/core/db/mysql.class.php b/htdocs/core/db/mysql.class.php
index 227a70a020f..50ef7ac4151 100644
--- a/htdocs/core/db/mysql.class.php
+++ b/htdocs/core/db/mysql.class.php
@@ -1079,8 +1079,16 @@ class DoliDBMysql extends DoliDB
         $resql=$this->query($sql);
         if (! $resql)
         {
-            dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_ERR);
-            return -1;
+            if ($this->lasterrno != 'DB_ERROR_USER_ALREADY_EXISTS') 
+            {
+        		dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_ERR);
+	            return -1;
+            }
+            else 
+            {
+            	// If user already exists, we continue to set permissions
+            	dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_WARNING);
+            }
         }
         $sql = "GRANT ALL PRIVILEGES ON ".$this->escape($dolibarr_main_db_name).".* TO '".$this->escape($dolibarr_main_db_user)."'@'".$this->escape($dolibarr_main_db_host)."' IDENTIFIED BY '".$this->escape($dolibarr_main_db_pass)."'";
         dol_syslog(get_class($this)."::DDLCreateUser", LOG_DEBUG);	// No sql to avoid password in log
diff --git a/htdocs/core/db/mysqli.class.php b/htdocs/core/db/mysqli.class.php
index c2400a43b7e..96b85633e7a 100644
--- a/htdocs/core/db/mysqli.class.php
+++ b/htdocs/core/db/mysqli.class.php
@@ -1073,8 +1073,16 @@ class DoliDBMysqli extends DoliDB
         $resql=$this->query($sql);
         if (! $resql)
         {
-            dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_ERR);
-            return -1;
+            if ($this->lasterrno != 'DB_ERROR_USER_ALREADY_EXISTS') 
+            {
+            	dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_ERR);
+            	return -1;
+            }
+            else 
+            {
+            	// If user already exists, we continue to set permissions
+            	dol_syslog(get_class($this)."::DDLCreateUser sql=".$sql, LOG_WARNING);
+            }
         }
         $sql = "GRANT ALL PRIVILEGES ON ".$this->escape($dolibarr_main_db_name).".* TO '".$this->escape($dolibarr_main_db_user)."'@'".$this->escape($dolibarr_main_db_host)."' IDENTIFIED BY '".$this->escape($dolibarr_main_db_pass)."'";
         dol_syslog(get_class($this)."::DDLCreateUser", LOG_DEBUG);	// No sql to avoid password in log