Application and docs received back along with new passport for passport renewal

[tnrao5]

Hi

I applied my wife passport renewal at Chicago recently and got her new passport along with old passport as well. Surprised to see that they sent me back all the documents like the application, Notary docs, photos (whatever I sent) along with new passport in a single shipment. Is it normal and no issue further? Did anyone else received the application and docs back with new passport? Appreciate an early response.