Tried the WD40 thing and no-go...The key is stuck pretty good.
The buzzer lever makes sense. I'm guessing that the lever rides on the bottom of the correctly installed key, which is flat. Now that I've installed the key "teeth down", the lever is engaging the teeth, locking the key in place preventing removal.
I'll give the straightened paperclip a shot. I'll let you know how things go.
On a separate note...I really appreciate the knowledge "on tap" at this site, and the members willing to share that knowledge. I am constantly amazed and inspired by the friendly interactions and never ending knowledge. Thanks