Two styles of security pin in a lock?

[UnlockD]

I didn't want to make a long title, so I'll rephrase. Is it rare/unheard of to have a lock with two type of security pins, not just different serrations in spool pins, but more along the lines of spool + mushroom pins?

[Schuyler]

Spool & Mushroom - specifically, is kind of odd. It's never common to find different types of security pins in a lock, but you'll sometimes find both spool & serrated or barrel and spool, things like that.

Others might have better/better informed answers.