Order to use corrector / concealer / foundation

[ImprovingMyMH]

I have all of these things from Bobbi Brown. I felt confused during my makeup session because the staff member applied foundation first IIRC.

Can anyone help? Thanks!

My order - starting with a moisturised face:

Primer
Foundation - blend in well
Colour corrector
Concealer - remember to 'set' it.

Moisturiser.
Primer.
Colour correct
Foundation
Conceal

That's how I do it anyway when I can be bothered that is!