according this code [here](https://github.com/kamailio/kamailio/blob/master/src/modules/rr/loose.c#L607...) and [here](https://github.com/kamailio/kamailio/blob/master/src/modules/rr/loose.c#L798...) second `Route` is removed if second present in same header. But second `Route` may be present in other header as in example. And second `Route` of same kamailio host is not removed