diff --git a/aged_partner_balance_na/__init__.py b/aged_partner_balance_na/__init__.py
index 095b9a8..f9f04df 100644
--- a/aged_partner_balance_na/__init__.py
+++ b/aged_partner_balance_na/__init__.py
@@ -20,11 +20,11 @@ def post_init(env):
         'availability_condition': 'always',
     })
     col_name_mapping = [
-        ('At Date', '0-29'),
-        ('1-30', '30-59'),
-        ('31-60', '60-89'),
-        ('61-90', '90-119'),
-        ('91-120', '120-159'),
+        ('At Date', 'Overdue'),
+        ('1-30', '0-29'),
+        ('31-60', '30-59'),
+        ('61-90', '60-89'),
+        ('91-120', '90-119'),
         ('Older', 'Later'),
     ]
     for old_name, new_name in col_name_mapping:
diff --git a/aged_partner_balance_na/models/aged_partner_balance.py b/aged_partner_balance_na/models/aged_partner_balance.py
index e3bb751..5095991 100644
--- a/aged_partner_balance_na/models/aged_partner_balance.py
+++ b/aged_partner_balance_na/models/aged_partner_balance.py
@@ -51,10 +51,14 @@ class AgedPartnerBalanceCustomHandler(models.AbstractModel):
         report._check_groupby_fields((next_groupby.split(',') if next_groupby else []) + ([current_groupby] if current_groupby else []))
 
         def plus_days(date_obj, days):
+            return fields.Date.to_string(date_obj + relativedelta(days=days))
+
+        def minus_days(date_obj, days):
             return fields.Date.to_string(date_obj - relativedelta(days=days))
 
         date_to = fields.Date.from_string(options['date']['date_to'])
         periods = [
+            (False, minus_days(date_to, 1))
             (date_to, plus_days(date_to, 29)),
             (plus_days(date_to, 30), plus_days(date_to, 59)),
             (plus_days(date_to, 60), plus_days(date_to, 89)),