So, i have the same problem with the game.
I purchased a Version of ArmA X Anniversary yesterday from a big german electro shop, installed everything and DayZ and when i then started the game, i was fully equiped with good weapons and stuff so i'm sure someone is using the same Players ID as i do.
As i'm aware of this Player ID problem, i didn't play the other character but i don't wan't to wait forever to play a game wich i payed for as i only buy a game once per year.
I'll put some Data, so you have a better picture of it:
Player ID: 160322AX
Game Version of Operation Arrowhead: 1.62.95417
Game Version of ArmA 2: 1.11
Beta Patch Version: 95417 (since the most Servers use it in the moment)
DayZ Mod Version: 126.96.36.199
A fix for this issue would be nice.