diff --git a/src/applications/phrequent/query/PhrequentSearchEngine.php b/src/applications/phrequent/query/PhrequentSearchEngine.php
index c45fd4a290..0569c93822 100644
--- a/src/applications/phrequent/query/PhrequentSearchEngine.php
+++ b/src/applications/phrequent/query/PhrequentSearchEngine.php
@@ -29,7 +29,8 @@ final class PhrequentSearchEngine extends PhabricatorApplicationSearchEngine {
   }
 
   public function buildQueryFromSavedQuery(PhabricatorSavedQuery $saved) {
-    $query = id(new PhrequentUserTimeQuery());
+    $query = id(new PhrequentUserTimeQuery())
+      ->needPreemptingEvents(true);
 
     $user_phids = $saved->getParameter('userPHIDs');
     if ($user_phids) {
@@ -136,7 +137,6 @@ final class PhrequentSearchEngine extends PhabricatorApplicationSearchEngine {
 
     foreach ($usertimes as $usertime) {
       $item = new PHUIObjectItemView();
-
       if ($usertime->getObjectPHID() === null) {
         $item->setHeader($usertime->getNote());
       } else {
@@ -154,12 +154,10 @@ final class PhrequentSearchEngine extends PhabricatorApplicationSearchEngine {
       $started_date = phabricator_date($usertime->getDateStarted(), $viewer);
       $item->addIcon('none', $started_date);
 
-      if ($usertime->getDateEnded() !== null) {
-        $time_spent = $usertime->getDateEnded() - $usertime->getDateStarted();
-        $time_ended = phabricator_datetime($usertime->getDateEnded(), $viewer);
-      } else {
-        $time_spent = time() - $usertime->getDateStarted();
-      }
+      $block = new PhrequentTimeBlock(array($usertime));
+      $time_spent = $block->getTimeSpentOnObject(
+        $usertime->getObjectPHID(),
+        PhabricatorTime::getNow());
 
       $time_spent = $time_spent == 0 ? 'none' :
         phutil_format_relative_time_detailed($time_spent);
@@ -172,7 +170,7 @@ final class PhrequentSearchEngine extends PhabricatorApplicationSearchEngine {
         $item->addAttribute(
           pht(
             'Ended on %s',
-            $time_ended));
+            phabricator_datetime($usertime->getDateEnded(), $viewer)));
       } else {
         $item->addAttribute(
           pht(
diff --git a/src/applications/phrequent/query/PhrequentUserTimeQuery.php b/src/applications/phrequent/query/PhrequentUserTimeQuery.php
index c173741c7a..2bb4674ddd 100644
--- a/src/applications/phrequent/query/PhrequentUserTimeQuery.php
+++ b/src/applications/phrequent/query/PhrequentUserTimeQuery.php
@@ -199,10 +199,31 @@ final class PhrequentUserTimeQuery
           $u_start = $u_event->getDateStarted();
           $u_end = $u_event->getDateEnded();
 
-          if (($u_start >= $e_start) &&
-              ($u_end === null || $u_end > $e_start)) {
-            $select[] = $u_event;
+          if ($u_start < $e_start) {
+            // This event started before our event started, so it's not
+            // preempting us.
+            continue;
           }
+
+          if ($u_start == $e_start) {
+            if ($u_event->getID() < $event->getID()) {
+              // This event started at the same time as our event started,
+              // but has a lower ID, so it's not preempting us.
+              continue;
+            }
+          }
+
+          if (($e_end !== null) && ($u_start > $e_end)) {
+            // Our event has ended, and this event started after it ended.
+            continue;
+          }
+
+          if (($u_end !== null) && ($u_end < $e_start)) {
+            // This event ended before our event began.
+            continue;
+          }
+
+          $select[] = $u_event;
         }
 
         $event->attachPreemptingEvents($select);