diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index 69e34556ddc..f5f7ffb008a 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -1082,6 +1082,8 @@ class AccountInvoice(models.Model):
 
         values['type'] = TYPE2REFUND[invoice['type']]
         values['date_invoice'] = date_invoice or fields.Date.context_today(invoice)
+        if values.get('date_due', False) and values['date_invoice'] > values['date_due']:
+            values['date_due'] = values['date_invoice']
         values['state'] = 'draft'
         values['number'] = False
         values['origin'] = invoice.number
diff --git a/addons/l10n_be_intrastat/wizard/xml_decl.py b/addons/l10n_be_intrastat/wizard/xml_decl.py
index 25f587f3980..8cadb3d094d 100644
--- a/addons/l10n_be_intrastat/wizard/xml_decl.py
+++ b/addons/l10n_be_intrastat/wizard/xml_decl.py
@@ -4,8 +4,10 @@
 import base64
 import xml.etree.ElementTree as ET
 from collections import namedtuple
+from functools import partial
 
 from odoo import api, exceptions, fields, models, _
+from odoo.tools import float_round, float_is_zero
 
 INTRASTAT_XMLNS = 'http://www.onegate.eu/2010-01-01'
 
@@ -102,7 +104,16 @@ class XmlDeclaration(models.TransientModel):
             'res_id': self.id,
         }
 
+    def _get_rounding_digits(self):
+        """A hook to not break behavior
+        Allows to programmatically set with what precision
+        the price, weight and values will be rounded"""
+        return 0
+
     def _build_intrastat_line(self, numlgn, item, linekey, amounts, dispatchmode, extendedmode):
+        round_digits = self._get_rounding_digits()
+        _round = partial(float_round, precision_digits=round_digits)
+
         self._set_Dim(item, 'EXSEQCODE', unicode(numlgn))
         self._set_Dim(item, 'EXTRF', unicode(linekey.EXTRF))
         self._set_Dim(item, 'EXCNT', unicode(linekey.EXCNT))
@@ -112,9 +123,9 @@ class XmlDeclaration(models.TransientModel):
         if extendedmode:
             self._set_Dim(item, 'EXTPC', unicode(linekey.EXTPC))
             self._set_Dim(item, 'EXDELTRM', unicode(linekey.EXDELTRM))
-        self._set_Dim(item, 'EXTXVAL', unicode(round(amounts[0], 0)).replace(".", ","))
-        self._set_Dim(item, 'EXWEIGHT', unicode(round(amounts[1], 0)).replace(".", ","))
-        self._set_Dim(item, 'EXUNITS', unicode(round(amounts[2], 0)).replace(".", ","))
+        self._set_Dim(item, 'EXTXVAL', unicode(_round(amounts[0])).replace(".", ","))
+        self._set_Dim(item, 'EXWEIGHT', unicode(_round(amounts[1])).replace(".", ","))
+        self._set_Dim(item, 'EXUNITS', unicode(_round(amounts[2])).replace(".", ","))
 
     def _get_intrastat_linekey(self, declcode, inv_line, dispatchmode, extendedmode):
         IntrastatRegion = self.env['l10n_be_intrastat.region']
@@ -296,7 +307,7 @@ class XmlDeclaration(models.TransientModel):
         numlgn = 0
         for linekey in entries:
             amounts = entries[linekey]
-            if round(amounts[0], 0) == 0:
+            if float_is_zero(amounts[0], precision_digits=self._get_rounding_digits()):
                 continue
             numlgn += 1
             item = ET.SubElement(datas, 'Item')
diff --git a/addons/l10n_be_intrastat_2019/models/account_intrastat_report.py b/addons/l10n_be_intrastat_2019/models/account_intrastat_report.py
index 2a091901a26..10bbf79494c 100644
--- a/addons/l10n_be_intrastat_2019/models/account_intrastat_report.py
+++ b/addons/l10n_be_intrastat_2019/models/account_intrastat_report.py
@@ -11,6 +11,15 @@ class XmlDeclaration(models.TransientModel):
     """
     _inherit = "l10n_be_intrastat_xml.xml_decl"
 
+    def _get_rounding_digits(self):
+        """
+        @override
+
+        https://www.nbb.be/doc/dq/f_pdf_ex/nieuwsbriefintrastat_n28_2018_fr.pdf
+        Chapter 3
+        """
+        return 2
+
     def _build_intrastat_line(self, numlgn, item, linekey, amounts, dispatchmode, extendedmode):
         super(XmlDeclaration, self)._build_intrastat_line(numlgn, item, linekey, amounts, dispatchmode, extendedmode)
         if dispatchmode:
diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index f0a8e3abbb9..74f779667f1 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -534,6 +534,9 @@ class WebsiteSale(http.Controller):
         new_values['customer'] = True
         new_values['team_id'] = request.website.salesteam_id and request.website.salesteam_id.id
 
+        if mode[0] == 'new':
+            new_values['company_id'] = request.website.company_id.id
+
         lang = request.lang if request.lang in request.website.mapped('language_ids.code') else None
         if lang:
             new_values['lang'] = lang
diff --git a/addons/website_sale/models/sale_order.py b/addons/website_sale/models/sale_order.py
index e29256f0c37..5a500879bdb 100644
--- a/addons/website_sale/models/sale_order.py
+++ b/addons/website_sale/models/sale_order.py
@@ -461,7 +461,7 @@ class Website(models.Model):
                 if code_pricelist:
                     pricelist_id = code_pricelist.id
                     update_pricelist = True
-            elif code is not None and sale_order.pricelist_id.code:
+            elif code is not None and sale_order.pricelist_id.code and code != sale_order.pricelist_id.code:
                 # code is not None when user removes code and click on "Apply"
                 pricelist_id = partner.property_product_pricelist.id
                 update_pricelist = True