Is this normal?

Just screw the stud by holding the rivet inside in the same place. All it needs is just screwing it is nothing to worry about. I had one stud fall off because of this and I screwed it back.
 
Just screw the stud by holding the rivet inside in the same place. All it needs is just screwing it is nothing to worry about. I had one stud fall off because of this and I screwed it back.
Hi,
Thanks for your suggestion. May I know what kind of tool did you use? I tried to use scissor to screw it back but it doesn't really work, they seem already tight together but somehow the leather tab is movable, so I don't know if there is something wrong. Thanks!