I doubt that there are any screws. Most likely, it's just held in with "clips". As to why it was "sticking out", I can't say. Hopefully, the clips just weren't all of the way "seated" and it's fixed now, but like he said, if it comes out again over time, then there is a deeper issue that they need to address.
I wouldn't worry about it unless it happens again.
I wouldn't worry about it unless it happens again.