When a user comments on an existing comment, the notification refers to the owner of the comment as the owner of the post, which is wrong.

To change this behaviour seems as simple as replacing the existing if/else statement in bp-activity-comment-notifier/core/functions.php:103
`php
if ($total_items > 1) {
$users = ac_notifier_find_involved_persons($activity_id);
} else {
$activity = new BP_Activity_Activity($secondary_item_id);
$users = array(0 => $activity->user_id);
}
`

With:

`php
if ($total_items > 1) {
$users = ac_notifier_find_involved_persons($activity_id);
} else {
$activity = new BP_Activity_Activity($secondary_item_id);
$users = array(0 => $activity->user_id);
if ($activity->secondary_item_id > 0) {
$activity = new BP_Activity_Activity($activity->secondary_item_id);
}
}
`