Originally Posted by butundo

They did not install your door lock correctly. I just had my door apart today to change the carrier. I had to play around with the lock to make sure it was seated correctly. At first, it didn't want to lock/unlock correctly until I reseated it, then it was fine. Another on this forum had similar issues until they removed the lock and reseated it.

I'm not sure what you are referring to with the "long bolt / phillips head". There is only 1 bolt, about 1 inch long. That is the bolt you have to access through the hole in the side of the door. That is the bolt that holds on the lock, which can be causing your problem. If they did loose the bolt, it most likely fell into the bottom inside of your door. Don't be surprised to hear something rattling around inside.