I'm not sure what we've done, but we are now seeing duplicate devices that really aren't. The only thing that I can find that is different is the Agent version. They all have one listing with Agent Version of 22.214.171.124 E and one listing with the version of 126.96.36.199. Some are listed as 188.8.131.52 E and 184.108.40.206.
If I delete one, both go away. When they repopulate the DB, both show up again.
I was trying to upgrade them all to 8.8. What did I do wrong?