UPDATE on this issue in case others are experiencing the same thing.
- I contacted Adobe chat help for this issue. I'm using Win 7 in case that's relevant.
- The tech support person accessed my PC virtually and saw the issue.
- He then checked and was able to reproduce the problem on a computer in his office, so it's not specific to my PC alone.
- He is escalating the matter to the Engineering team.
- It could be (probably is) a bug.
C