Solutions
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stevesreed's post in removing wave device not shown in ISY was marked as the answerFollow up on this issue, in case anyone else find it by searching.
After updating to 5.5.9, I was able to get the device to show up by running Synchronize/New &Deleted with interview.
Once it was listed, I could delete it with a simple right click delete
Also, with 5.5.9, the network healing process did not fail when it hit the phantom copy of my Schlage lock.
Still nice to have it gone.