Yeah i believe it was that 1 inch bolt they lost and replaced.. and it makes sense it fell down somewhere inside the door.. and i also wouldn't be surprised if he installed it incorrectly. he is getting frustrating.
as for the part popping off, if you were looking at the door handle from outside, the keyhole part was beginning to pop out and you can see the bolt if you looked between the keyhole and the door.
oh and thanks for the quick response