Mail not in global folder

Usually I can see all the new mails in the Global folder (the first folder in left column). I heard the sound of a new mail, but I could not see it.
I saw there was something looking at “not read” which was bold.

The mail was in a special folder, the right place, further to a rule.

So, my question is:
is it normal that a mail arriving in a special folder cannot be seen in the global folder?
(Sorry for my bad english).

Global Inbox contains only email messages from other Inbox folders so my answer is: Yes, it is normal.

Ok. Thanks.