diff --git a/erpnext/education/doctype/student_attendance/student_attendance.py b/erpnext/education/doctype/student_attendance/student_attendance.py
index 595dff9b9d..72a8f55c66 100644
--- a/erpnext/education/doctype/student_attendance/student_attendance.py
+++ b/erpnext/education/doctype/student_attendance/student_attendance.py
@@ -75,6 +75,6 @@ class StudentAttendance(Document):
 			})
 
 		if attendance_record:
-			record = get_link_to_form('Attendance Record', attendance_record)
+			record = get_link_to_form('Student Attendance', attendance_record)
 			frappe.throw(_('Student Attendance record {0} already exists against the Student {1}')
 				.format(record, frappe.bold(self.student)), title=_('Duplicate Entry'))
diff --git a/erpnext/stock/report/stock_balance/stock_balance.py b/erpnext/stock/report/stock_balance/stock_balance.py
index 042087a4a7..1339d9b682 100644
--- a/erpnext/stock/report/stock_balance/stock_balance.py
+++ b/erpnext/stock/report/stock_balance/stock_balance.py
@@ -168,6 +168,7 @@ def get_stock_ledger_entries(filters, items):
 		from
 			`tabStock Ledger Entry` sle force index (posting_sort_index)
 		where sle.docstatus < 2 %s %s
+		and is_cancelled = 0
 		order by sle.posting_date, sle.posting_time, sle.creation, sle.actual_qty""" % #nosec
 		(item_conditions_sql, conditions), as_dict=1)
 
diff --git a/erpnext/support/doctype/issue/issue.py b/erpnext/support/doctype/issue/issue.py
index 920c13c38d..62b39cced5 100644
--- a/erpnext/support/doctype/issue/issue.py
+++ b/erpnext/support/doctype/issue/issue.py
@@ -7,7 +7,7 @@ import json
 from frappe import _
 from frappe import utils
 from frappe.model.document import Document
-from frappe.utils import time_diff_in_hours, now_datetime, getdate, get_weekdays, add_to_date, today, get_time, get_datetime, time_diff_in_seconds, time_diff
+from frappe.utils import now_datetime, getdate, get_weekdays, add_to_date, get_time, get_datetime, time_diff_in_seconds
 from datetime import datetime, timedelta
 from frappe.model.mapper import get_mapped_doc
 from frappe.utils.user import is_website_user
@@ -355,13 +355,13 @@ def set_service_level_agreement_variance(issue=None):
 		doc = frappe.get_doc("Issue", issue.name)
 
 		if not doc.first_responded_on: # first_responded_on set when first reply is sent to customer
-			variance = round(time_diff_in_hours(doc.response_by, current_time), 2)
+			variance = round(time_diff_in_seconds(doc.response_by, current_time), 2)
 			frappe.db.set_value(dt="Issue", dn=doc.name, field="response_by_variance", val=variance, update_modified=False)
 			if variance < 0:
 				frappe.db.set_value(dt="Issue", dn=doc.name, field="agreement_status", val="Failed", update_modified=False)
 
 		if not doc.resolution_date: # resolution_date set when issue has been closed
-			variance = round(time_diff_in_hours(doc.resolution_by, current_time), 2)
+			variance = round(time_diff_in_seconds(doc.resolution_by, current_time), 2)
 			frappe.db.set_value(dt="Issue", dn=doc.name, field="resolution_by_variance", val=variance, update_modified=False)
 			if variance < 0:
 				frappe.db.set_value(dt="Issue", dn=doc.name, field="agreement_status", val="Failed", update_modified=False)