In all developments in Lotus Notes we use a lot of views and it's normal repeat views. The idea is make folder classification don't affect of the name of the view from the designer knows which view belogns a dblookup or lotuscript to search something.
I put an example: Customer By Vat , this view is used the form customer, and used by financial department.
(Customer by Vat) is used by a program with viewentry and need to sort of one way , if you change the sort the program can crush. Indicates by virtual folders that is used with this form and need this features.