diff --git a/db/migrations/20261026101717_create_lims_value_binding.php b/db/migrations/20261026101717_create_lims_value_binding.php
new file mode 100644
index 00000000..3b3f4925
--- /dev/null
+++ b/db/migrations/20261026101717_create_lims_value_binding.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+/**
+ * Ex public/userarea/sql/lims_value_binding.sql (feature/xls-mapping)
+ */
+final class CreateLimsValueBinding extends AbstractMigration
+{
+    public function up(): void
+    {
+        if ($this->hasTable('lims_value_binding')) {
+            return;
+        }
+
+        $this->execute("
+            CREATE TABLE `lims_value_binding` (
+              `id` int(11) NOT NULL AUTO_INCREMENT,
+              `template_id` int(11) NOT NULL,
+              `mapping_id` int(11) NOT NULL,
+              `field_id` int(11) NOT NULL,
+              `source_value` varchar(500) NOT NULL,
+              `source_key` varchar(500) NOT NULL,
+              `lims_value_id` int(11) NOT NULL,
+              `lims_value` varchar(500) DEFAULT NULL,
+              `created_by` int(11) DEFAULT NULL,
+              `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+              `updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+              PRIMARY KEY (`id`),
+              UNIQUE KEY `uq_mapping_source` (`mapping_id`, `source_key`),
+              KEY `idx_template` (`template_id`),
+              KEY `idx_field_source` (`field_id`, `source_key`)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci
+        ");
+    }
+
+    public function down(): void
+    {
+        $this->execute("DROP TABLE IF EXISTS `lims_value_binding`");
+    }
+}
diff --git a/db/migrations/20261026101723_xls_fixed_field_binding.php b/db/migrations/20261026101723_xls_fixed_field_binding.php
new file mode 100644
index 00000000..95c13804
--- /dev/null
+++ b/db/migrations/20261026101723_xls_fixed_field_binding.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+use Phinx\Migration\AbstractMigration;
+
+/**
+ * Ex public/userarea/sql/fixed_field_binding.sql (feature/xls-mapping)
+ * Idempotente: salta colonne/indici gia' presenti.
+ */
+final class XlsFixedFieldBinding extends AbstractMigration
+{
+    public function up(): void
+    {
+        // --- template_fixed_mapping ---
+        $tfm = $this->table('template_fixed_mapping');
+
+        if (!$tfm->hasColumn('json_node')) {
+            $this->execute("ALTER TABLE `template_fixed_mapping`
+                ADD COLUMN `json_node` varchar(500) DEFAULT NULL");
+        }
+
+        if (!$tfm->hasColumn('default_source')) {
+            $this->execute("ALTER TABLE `template_fixed_mapping`
+                ADD COLUMN `default_source` enum('manual','xls','json') NOT NULL DEFAULT 'manual'");
+        } else {
+            $this->execute("ALTER TABLE `template_fixed_mapping`
+                MODIFY COLUMN `default_source` enum('manual','xls','json') NOT NULL DEFAULT 'manual'");
+        }
+
+        if (!$tfm->hasColumn('excel_column')) {
+            $this->execute("ALTER TABLE `template_fixed_mapping`
+                ADD COLUMN `excel_column` varchar(255) DEFAULT NULL AFTER `json_node`");
+        }
+
+        // --- lims_value_binding ---
+        $lvb = $this->table('lims_value_binding');
+
+        if (!$lvb->hasColumn('binding_kind')) {
+            $this->execute("ALTER TABLE `lims_value_binding`
+                ADD COLUMN `binding_kind` enum('custom','fixed') NOT NULL DEFAULT 'custom' AFTER `template_id`");
+        }
+
+        $this->execute("ALTER TABLE `lims_value_binding`
+            MODIFY COLUMN `field_id` int(11) NOT NULL DEFAULT 0");
+
+        if ($lvb->hasIndexByName('uq_mapping_source')) {
+            $this->execute("ALTER TABLE `lims_value_binding` DROP INDEX `uq_mapping_source`");
+        }
+
+        if (!$lvb->hasIndexByName('uq_kind_mapping_source')) {
+            $this->execute("ALTER TABLE `lims_value_binding`
+                ADD UNIQUE KEY `uq_kind_mapping_source` (`binding_kind`, `mapping_id`, `source_key`)");
+        }
+    }
+
+    public function down(): void
+    {
+        $lvb = $this->table('lims_value_binding');
+
+        if ($lvb->hasIndexByName('uq_kind_mapping_source')) {
+            $this->execute("ALTER TABLE `lims_value_binding` DROP INDEX `uq_kind_mapping_source`");
+        }
+        if (!$lvb->hasIndexByName('uq_mapping_source')) {
+            $this->execute("ALTER TABLE `lims_value_binding`
+                ADD UNIQUE KEY `uq_mapping_source` (`mapping_id`, `source_key`)");
+        }
+        if ($lvb->hasColumn('binding_kind')) {
+            $this->execute("ALTER TABLE `lims_value_binding` DROP COLUMN `binding_kind`");
+        }
+        $this->execute("ALTER TABLE `lims_value_binding`
+            MODIFY COLUMN `field_id` int(11) NOT NULL");
+
+        $tfm = $this->table('template_fixed_mapping');
+        foreach (['excel_column', 'default_source', 'json_node'] as $col) {
+            if ($tfm->hasColumn($col)) {
+                $this->execute("ALTER TABLE `template_fixed_mapping` DROP COLUMN `$col`");
+            }
+        }
+    }
+}
diff --git a/public/userarea/filter_records.php b/public/userarea/filter_records.php
index 6c47bdab..6534c850 100644
--- a/public/userarea/filter_records.php
+++ b/public/userarea/filter_records.php
@@ -39,8 +39,14 @@ if (!empty($explicitIds)) {
     // Scoping di sicurezza: solo record del template/utente/import corretti.
     $conds  = ['d.templateid = ?', 'd.status = ?'];
     $params = [$templateId, $status];
-    if (!$showAll)          { $conds[] = 'd.user_id = ?';            $params[] = $userId; }
-    if ($importref !== '')  { $conds[] = 'd.importreferencecode = ?'; $params[] = $importref; }
+    if (!$showAll) {
+        $conds[] = 'd.user_id = ?';
+        $params[] = $userId;
+    }
+    if ($importref !== '') {
+        $conds[] = 'd.importreferencecode = ?';
+        $params[] = $importref;
+    }
     $ph = implode(',', array_fill(0, count($explicitIds), '?'));
     $conds[] = "d.iddatadb IN ($ph)";
     foreach ($explicitIds as $id) $params[] = $id;
@@ -57,7 +63,7 @@ if (!empty($explicitIds)) {
         $idStmt = $pdo->prepare("
             SELECT d.iddatadb FROM datadb d
             WHERE {$whereSql}
-            ORDER BY d.excelrow ASC, d.iddatadb ASC
+            ORDER BY CAST(d.excelrow AS UNSIGNED) ASC, d.excelrow ASC, d.iddatadb ASC
             LIMIT {$perPage} OFFSET {$offset}
         ");
         $idStmt->execute($params);