Passports received but not certificates yet.

[Luckyjack]

Hi,
We have received our US passports by mail. At the time of oath, they gave us the citizenship certificates. We went to a passport office for the passports, where we have given our certificates as well. Four weeks later ,we have received our new US passports, but not the certificates as yet. Its been 4 days now that we received our US passports ,but no certificates yet(we were told then that certificates will come back first in mail).
Is it normal to receive the passports first and then our certificates. Please share your ideas.
Thanks.

[Luckyjack]

Ok, we have received them today. thanks anyways.