I picked up a four pack of Third Reality outlets (non-power reporting). I joined them to my mesh and did a firmware update. The first one was OK:
The firmware was updated from version 58 to 5C. The next three looked like this:
It says it is updating from 58 to 58. It actually updates to 5C as expected. It looks like if the firmware has already been downloaded it is posting the old version in both fields.
Everything worked and the outlets are now all on the same 5C version. Only the log entry is incorrect.