Maybe I will look at the source files myself at some point but right now I'd rather just play on official servers
Since I have personally experienced the "double drop" since using a bracelet with 20% DD on DE server, I am quite convinced it has to be implemented somewhere.
It is especially noticeable when farming dragon stone shards, because the 2 dropped shards will in those instances be stackable, which is normally (unfortunately) not the case.
I stumbled upon this thread by googling for "metin2 random number generator" and don't want some baseless accusations of faulty coding stand uncontested in case other people come here the same way.