The problem occures only if MF_CONF_TRUE_DELETE in config.php file is set to TRUE.
To fix this, you can edit manage_entries.php and go to around line 288.
You will find this code :
if(!empty($row['total_deleted_entry'])){
$show_reset_entry_number = true;
}
Change this code to be:
if(!empty($row['total_deleted_entry']) || MF_CONF_TRUE_DELETE){
$show_reset_entry_number = true;
}
And the problem will disappear!