That was a nice, clear set of instructions. Your explanation proves the gun is sound, it is human error reassembling the gun after a cleaning that is the problem. I haven't had any problems with my GSG, but it is important to be aware of what will go wrong, if you do not put your handgun back together as it is intended.
Don't take this last comment as arrogance.... but my goodness, if you don't know how to properly reassemble your handgun correctly, then you really are a danger to yourself and friends you shoot with. Guns are not toys. Guns don't clean themselves, point by themselves, nor are they capable of pulling their own triggers. Please don't get complacent folks.
Thanks again for the write up. Always willing to learn.