Just discovered something interesting:
As mentioned, I was finally able to add the two devices that had failed before.
When I reviewed the device list, all those marked ineligible now show “Coverage Expired.” Until a few minutes ago, some of them showed different tags, like “Age of this device…”
Even more curious, a couple of my refurbished devices (purchased from Amazon, OWC, and Woot) now display a coverage end date of April 2, 1978—a date they never showed previously.
Has anyone seen this before?