OK, Much like the Poster of that thread I was sent, my problem seems to have lain with the switch... I had reset the switch, so it wasn't a change I had made... But rather a default configuration of the TP-link switch... (TL-SG1016PE)
I turned OFF IGMP Snooping and it seems to have stopped the error.
Does this make sense? MAybe it has something to do with the multiple Dockers using the same connection? (No, It happened with NO dockers installed)
I will take a CLOSE look at my switching tonight and make sure that I do not have a loop, but honestly, I don't think I do (It's behind my server so I can't see it easily.
Arbadacarba's post in kernel: br0: received packet on eth0 with own address as source address was marked as the answer