I have a software for blockbusters

Suppose there are two films with the same name
The customer has a button in the for to help him
to create a new record without the work of typing all data again
So a new record is created with new code, as below

00101 - TERMINATOR
00102 - TERMINADOR
00103 - TERMINATOR
00104 - TERMINATOR

Now I have a customer who is complaining about my software

He said the software should work as below

00101 - TERMINADOR; quantity 3

I don't agree with his logic but I have a doubt
What do you guys think would be the normal logic for
most blockbusters ?