diff --git a/docs/changelog/7.x.x.txt b/docs/changelog/7.x.x.txt
index 47ddc5f75..00e89d975 100644
--- a/docs/changelog/7.x.x.txt
+++ b/docs/changelog/7.x.x.txt
@@ -54,6 +54,7 @@
  - fixed #11004: Subscribable AssetAspect: handling the subscription group
  - fixed #10990: Survey: View Transposed Results not working
  - fixed #11009: Shipping address is lost after login
+ - fixed #11010: Purchasing non-recurring subscription twice does not extend group membership
 
 7.7.19
  - fixed #10838: Forwarded forum post email to new CS adds reply to original thread
diff --git a/lib/WebGUI/Asset/Sku/Subscription.pm b/lib/WebGUI/Asset/Sku/Subscription.pm
index 01469e8ed..82c52996d 100644
--- a/lib/WebGUI/Asset/Sku/Subscription.pm
+++ b/lib/WebGUI/Asset/Sku/Subscription.pm
@@ -58,19 +58,30 @@ specified by the session variable.
 
 sub apply {
 	my $self    = shift;
-	my $userId  = shift || $self->session->user->userId;
+    my $session = $self->session;
+	my $userId  = shift || $session->user->userId;
 	my $groupId = $self->get('subscriptionGroup');
 
 	# Make user part of the right group and adjust the expiration date
-	my $group   = WebGUI::Group->new($self->session,$groupId);
-	$group->addUsers( [$userId], $self->getExpirationOffset );
+	my $group   = WebGUI::Group->new($session, $groupId);
+    my $user    = WebGUI::User->new($session, $userId);
+    if ($user->isInGroup($group->getId) && ! $self->isRecurring) {
+        my $expireDate = $group->userGroupExpireDate($userId);
+        $expireDate   += $self->getExpirationOffset;
+        $group->userGroupExpireDate($userId, $expireDate);
+    }
+    else {
+        $group->addUsers( [$userId], $self->getExpirationOffset );
+    }
 
 	# Add karma to the user's account
-	WebGUI::User->new($self->session,$userId)->karma($self->get('karma'), 'Subscription', 'Added for purchasing subscription '.$self->get('title'));
+    if ($session->setting->get('userKarma')) {
+        WebGUI::User->new($session,$userId)->karma($self->get('karma'), 'Subscription', 'Added for purchasing subscription '.$self->get('title'));
+    }
 
 	# Process the executeOnPurchase field
 	my $command = $self->get('executeOnSubscription');
-	WebGUI::Macro::process($self->session,\$command);
+	WebGUI::Macro::process($session,\$command);
 	system($command) if ($self->get('executeOnSubscription') ne "");
 }
 
diff --git a/t/Asset/Sku/Subscription.t b/t/Asset/Sku/Subscription.t
new file mode 100644
index 000000000..4e08811d9
--- /dev/null
+++ b/t/Asset/Sku/Subscription.t
@@ -0,0 +1,73 @@
+# vim:syntax=perl
+#-------------------------------------------------------------------
+# WebGUI is Copyright 2001-2009 Plain Black Corporation.
+#-------------------------------------------------------------------
+# Please read the legal notices (docs/legal.txt) and the license
+# (docs/license.txt) that came with this distribution before using
+# this software.
+#------------------------------------------------------------------
+# http://www.plainblack.com                     info@plainblack.com
+#------------------------------------------------------------------
+
+# Write a little about what this script tests.
+#
+# This tests WebGUI::Asset::Sku::Donation
+
+use FindBin;
+use strict;
+use lib "$FindBin::Bin/../../lib";
+use Test::More;
+use Test::Deep;
+use Test::Number::Delta;
+use WebGUI::Test; # Must use this before any other WebGUI modules
+use WebGUI::Session;
+use WebGUI::Asset;
+use WebGUI::Asset::Sku::Subscription;
+
+#----------------------------------------------------------------------------
+# Init
+my $session         = WebGUI::Test->session;
+
+
+#----------------------------------------------------------------------------
+# Tests
+
+plan tests => 4;        # Increment this number for each test you create
+
+#----------------------------------------------------------------------------
+# put your tests here
+my $root  = WebGUI::Asset->getRoot($session);
+my $group = WebGUI::Group->new($session, 'new');
+WebGUI::Test->groupsToDelete($group);
+my $user  = WebGUI::User->create($session);
+WebGUI::Test->usersToDelete($user);
+
+my $sku = $root->addChild({
+        className => "WebGUI::Asset::Sku::Subscription",
+        title     => "Test Subscription",
+        price     => 50.00,
+        recurringSubscription => 0,
+        subscriptionGroup     => $group->getId,
+        duration              => 'Monthly',
+        });
+my $versionTag = WebGUI::VersionTag->getWorking($session);
+WebGUI::Test->tagsToRollback($versionTag);
+isa_ok($sku, "WebGUI::Asset::Sku::Subscription");
+
+is($sku->getPrice, 50.00, "Price should be 50.00");
+
+$sku->apply($user->userId);
+
+cmp_deeply(
+    $group->userGroupExpireDate($user->getId)-time(),
+    num($sku->getExpirationOffset, 5),
+    "apply: sets user's group expiration offset correctly"
+);
+
+$sku->apply($user->userId);
+
+cmp_deeply(
+    $group->userGroupExpireDate($user->getId)-time(),
+    num(2*$sku->getExpirationOffset, 10),
+    "... increments user's expiration offset when the subscription is non-recurring and they are already a group member"
+);