Take3 on last, a=chris

diff --git a/src/library/PartitionDocumentBundle.php b/src/library/PartitionDocumentBundle.php
index 7e3ed417b..ab52f79dc 100644
--- a/src/library/PartitionDocumentBundle.php
+++ b/src/library/PartitionDocumentBundle.php
@@ -343,7 +343,7 @@ class PartitionDocumentBundle
         $index_file_name = $this->getPartitionIndex($partition);
         if (!empty($this->index_cache[$partition]) && !$force_load) {
             $index = $this->index_cache[$partition][0];
-            $this->index_cache[$partition][1] = $this->index_cache['time'];
+            $this->index_cache[$partition][1] = time();
         } else {
             $this->index_cache ??= [];
             if (count($this->index_cache) > $this->index_cache_size) {
@@ -353,7 +353,7 @@ class PartitionDocumentBundle
                     if (empty($cache_info[1])) {
                         unset($this->index_cache[$index_partition]);
                     } else if (!empty($cache_info[1]) &&
-                        $cache_info[1] < $oldest_time) {
+                        $cache_info[1] <= $oldest_time) {
                         $oldest_time = $cache_info[1];
                         $oldest_partition = $index_partition;
                     }