Outlook2013 Unable to delete message

Just installed, changed various settings always can't delete mail

Find a question and answer saying that the view changes to a conversation

Try it, it works!

But I do not like the dialogue view, change back, also works!

Try a folder that you haven't set up, or it works!

It's finally possible to delete the message.

Although this deletion operation is not normal, the deleted mail will not enter the Deleted Items folder, but is completely deleted ...

But I still want to ask, what is the relationship between these two things???

Outlook2013 Unable to delete message