diff --git a/vendor/magento/module-quick-order/view/frontend/web/js/multiple-skus.js b/vendor/magento/module-quick-order/view/frontend/web/js/multiple-skus.js
index ea4e073759d..c11682ab161 100644
--- a/vendor/magento/module-quick-order/view/frontend/web/js/multiple-skus.js
+++ b/vendor/magento/module-quick-order/view/frontend/web/js/multiple-skus.js
@@ -69,8 +69,9 @@ define([
                 skuArray = this._getValueArray(),
                 skuCounter = 0;

-            $.each(skuArray, function (index, val) {
-                var singleSkuInput = self._getSingleSkuInput(val, true),
+            $.each(skuArray, function (index, value) {
+                var val = value.trim().toLowerCase(),
+                    singleSkuInput = self._getSingleSkuInput(val, true),
                     item = {
                         'sku': val,
                         'qty': 1
@@ -78,7 +79,7 @@ define([
                     skipItem = false;

                 postArray.filter(function (postItem) {
-                    if (postItem.sku === val) {
+                    if (postItem.sku.toLowerCase() === val) {
                         ++postItem.qty;
                         skipItem = true;
                     }
@@ -109,7 +110,7 @@ define([
                 self.options.dataError.text = null;

                 $.each(data.items, function (index, item) {
-                    var singleSkuInput = self._getSingleSkuInput(item.sku);
+                    var singleSkuInput = self._getSingleSkuInput(item.sku.toString());

                     if (singleSkuInput !== false) {
                         item.toRewriteQty = true;
@@ -173,7 +174,7 @@ define([
                 elem = false;

             $.each(allSkuInputs, function () {
-                if ($(this).val() === '' && !skipEmpty || $(this).val() === sku) {
+                if ($(this).val() === '' && !skipEmpty || $(this).val().toLowerCase() === sku) {
                     elem = $(this);
                     elem.qty = parseFloat(elem.closest('.deletable-item').find(self.options.qtySelector)[0].value) + 1;

diff --git a/vendor/magento/module-quick-order/view/frontend/web/js/product-sku-item.js b/vendor/magento/module-quick-order/view/frontend/web/js/product-sku-item.js
index badcb3fb8ad..4a043be3ddc 100644
--- a/vendor/magento/module-quick-order/view/frontend/web/js/product-sku-item.js
+++ b/vendor/magento/module-quick-order/view/frontend/web/js/product-sku-item.js
@@ -102,6 +102,10 @@ define([
             qtyInput.val(parseFloat(data.qty));
             this._clearProductBlock();
             this._addBlock(data);
+
+            if (!this._isEmptyRowExist()) {
+                this.element.trigger('addNewRow');
+            }
         },

         /**
@@ -124,17 +128,39 @@ define([
          */
         _addByAjax: function () {
             var postArray = [],
-                skuElement = this.element.find(this.options.qtySelector),
+                skuElement = this.element.find(this.options.skuSelector),
+                qtyElement = this.element.find(this.options.qtySelector),
                 item = {
-                    'sku': this.element.find(this.options.skuSelector).val(),
-                    'qty': skuElement.val()
-                };
+                    'sku': skuElement.val(),
+                    'qty': qtyElement.val()
+                },
+                self = this,
+                isExistedSku = false;

             postArray.push(item);
             this._clearProductBlock();
-            skuElement.prop('disabled', true);
+            qtyElement.prop('readonly', true);
+
+            if ($(this.options.skuSelector).length > 0) {
+                $.each($(this.options.skuSelector), function () {
+                    if (item.sku && $(this).val().toLowerCase() === item.sku.toString().toLowerCase() &&
+                        $(this).attr('id') !== skuElement.attr('id')) {
+                        if (item.qty === '') {
+                            item.qty = 1;
+                        }
+                        $(this).closest('.deletable-item').find(self.options.qtySelector).val(
+                            parseFloat(
+                                $(this).closest('.deletable-item').find(self.options.qtySelector).val()
+                            ) + parseFloat(item.qty)
+                        );
+                        skuElement.val('');
+                        qtyElement.val('');
+                        isExistedSku = true;
+                    }
+                });
+            }

-            if (item.sku !== '') {
+            if (item.sku !== '' && !isExistedSku) {
                 $.post(
                     this.options.urlSku,
                     {
@@ -154,11 +180,11 @@ define([
                         this._reloadError();
                     }.bind(this)
                 ).done(function () {
-                    skuElement.prop('disabled', false);
+                    qtyElement.prop('readonly', false);
                 });
             } else {
                 this._reloadError();
-                skuElement.prop('disabled', false);
+                qtyElement.prop('readonly', false);
             }
         },