Background: I had to restore my computer to factory settings because of a
virus. My backup software was not working well, so all backed up folders,
including my .pst folder, were corrupted. I used Stellar Phoenix Outlook Pst
Repair to recover my Outlook data. Because I did recoveries on 4 .pst files
from several time points, I ended up with many duplicate emails, contacts,
and calendar entries.

Calendar problem: I removed duplicate calendar entries manually by
highlighting them on monthly calendars and clicking Delete. The next time I
started Outlook, I was surprised to see that all my appointments had
disappeared from the calendar, even though I had left one of each. However,
when I went to View - Current View - All Appointments, all my appointments
showed. Why do they not show on the calendar?