Per default, only load enabled.

There is a caching problem where caches cleared reflect the second last configuration.

feeds.module

@@ -446,10 +446,12 @@ function feeds_scheduler_work($feed_info) {
 /**
  * Load all importers.
  *
+ * @
+ *
  * @return
  *   An array of all feed configurations available.
  */
-function feeds_importer_load_all() {
+function feeds_importer_load_all($load_disabled = FALSE) {
   $feeds = array();
   // This function can get called very early in install process through
   // menu_router_rebuild(). Do not try to include CTools if not available.
@@ -457,7 +459,7 @@ function feeds_importer_load_all() {
     ctools_include('export');
     $configs = ctools_export_load_object('feeds_importer', 'all');
     foreach ($configs as $config) {
-      if ($config->id) {
+      if (!empty($config->id) && ($load_disabled || !$config->disabled)) {
         $feeds[$config->id] = feeds_importer($config->id);
       }
     }

feeds_ui/feeds_ui.admin.inc

@@ -61,7 +61,7 @@ function feeds_ui_overview_form(&$form_status) {
     t('Operations'),
     t('Enabled'),
   );
-  foreach (feeds_importer_load_all() as $importer) {
+  foreach (feeds_importer_load_all(TRUE) as $importer) {
     $importer_form = array();
     $importer_form['name']['#value'] = $importer->config['name'];
     $importer_form['description']['#value'] = $importer->config['description'];
@@ -135,7 +135,7 @@ function feeds_ui_overview_form(&$form_status) {
 function feeds_ui_overview_form_submit($form, &$form_state) {
 
   $disabled = array();
-  foreach (feeds_importer_load_all() as $importer) {
+  foreach (feeds_importer_load_all(TRUE) as $importer) {
     $disabled[$importer->id] = !$form_state['values'][$importer->id];
   }
   variable_set('default_feeds_importer', $disabled);