changing lock barrels

[billy140572]

I bought my Berlingo a few weeks ago and when I bought it the lady said it had its ignition barrel changed due to the old one becoming faulty but the old one is in the glove box along with the door locks, the door locks have not been changed just the ignition.

I had a look at the new door locks including a new one for the petrol cap but I have 5 new barrels plus the new petrol cap and I have tried the ignition key in every one and they all work with it, are they hard to change over and why do you think I have 5 new barrels????