Brian,
Yep, debugging may be necessary, I'm receiving someone else's traffic again:
2017-06-02 08:04:44.392 0.000 TCP 1.34.202.215:24351 ->
44.62.1.81:16165 1 552 1
2017-06-02 08:05:49.494 0.000 TCP 195.88.209.24:41058 ->
44.62.1.81:3388 1 40 1
- Lynwood
KB3VWG
I restarted the ipip daemon and they went away.
Looks like it's time to debug the routing table maintenance routing.