Just logged on to Gold server and my level 18 Bulbasaur was replaced by a level 5 Bulbasaur with no EVs. IVs and nature appear to be the same, so I'm guessing it is a duplicate. The duplicate Bulbasaur ID is 41226997, so I assume it is the same ID number as the one that disappeared?
EDIT: Just logged on again and now the bulbasaur is back, the level 5 bulbasaur is still there, and my level 16 poliwag is missing. My game is seriously bugged....
EDIT 2: Now my Jynx from cerulean city trade has disappeared. i have not released any of these. Someone please help
EDIT 3: Jynx back now, level 31 Gyarados is gone now