you are still using the recordset bindings on the Find Record tab:
$Authenticate->addFilter("usr_id", "=", "s", "".($rs_users->getColumnVal("usr_id")) ."");
$Authenticate->addFilter("usr_pwd", "=", "s", "".($rs_users->getColumnVal("usr_pwd")) ."");
These should be using the user and pass form element bindings instead of the recordset bindings.