diff --git a/app/controllers/admin/admin_users_controller.rb b/app/controllers/admin/admin_users_controller.rb
index 17de2f97d..86ff97510 100644
--- a/app/controllers/admin/admin_users_controller.rb
+++ b/app/controllers/admin/admin_users_controller.rb
@@ -43,7 +43,7 @@ class Admin::AdminUsersController < AdminController
   def destroy
     if @admin_user.destroy
       flash[:notice] = I18n.t('record_deleted')
-      redirect_to admin_users_path
+      redirect_to admin_admin_users_path
     else
       flash.now[:alert] = I18n.t('failed_to_delete_record')
       render 'show'
diff --git a/app/mailers/invoice_mailer.rb b/app/mailers/invoice_mailer.rb
index 54c6a8605..c3eb20f6f 100644
--- a/app/mailers/invoice_mailer.rb
+++ b/app/mailers/invoice_mailer.rb
@@ -1,8 +1,9 @@
 class InvoiceMailer < ApplicationMailer
   include Que::Mailer
 
-  def invoice_email(invoice_id, html)
+  def invoice_email(invoice_id, html, billing_email)
     @invoice = Invoice.find_by(id: invoice_id)
+    billing_email ||= @invoice.billing_email
     return unless @invoice
     return if whitelist_blocked?(@invoice.billing_email)
 
@@ -11,6 +12,6 @@ class InvoiceMailer < ApplicationMailer
     invoice = @invoice
 
     attachments[invoice.pdf_name] = pdf
-    mail(to: format(invoice.billing_email), subject: invoice)
+    mail(to: format(billing_email), subject: invoice)
   end
 end
diff --git a/app/models/invoice.rb b/app/models/invoice.rb
index 0c4e23a08..8bc5137d5 100644
--- a/app/models/invoice.rb
+++ b/app/models/invoice.rb
@@ -117,7 +117,7 @@ class Invoice < ActiveRecord::Base
     return false unless valid?
     return false unless billing_email.present?
 
-    InvoiceMailer.invoice_email(id, html).deliver
+    InvoiceMailer.invoice_email(id, html, billing_email).deliver
     true
   end
 
diff --git a/app/views/admin/registrars/show.haml b/app/views/admin/registrars/show.haml
index c44523d87..728386f36 100644
--- a/app/views/admin/registrars/show.haml
+++ b/app/views/admin/registrars/show.haml
@@ -96,6 +96,10 @@
           %tbody
             - @registrar.white_ips.each do |x|
               %tr
-                %td= link_to(x.ipv4, [:admin, @registrar, x])
-                %td= link_to(x.ipv6, [:admin, @registrar, x])
+                %td
+                  - if x.ipv4.present?
+                    = link_to(x.ipv4, [:admin, @registrar, x])
+                %td
+                  - x.ipv6.present?
+                    = link_to(x.ipv6, [:admin, @registrar, x])
                 %td= x.interfaces.join(', ').upcase