All very strange ...
code 750147 GAS has as 9M-AFU A320 which is correct but the GAS function kept trying to enter details for 9M-FCL LJ60 and downloaded a very pic as well.
Likewise, picked up an old German code now used by an Indonesian aircraft, entered the correct details but it kept adding the German aircraft details and when I looked at the database there were 2 entries.
This is slightly at odds with what you say will happen...confused !
My only option has been to disable the GAS/pic function.
Should add that at no stage am I saying the data GAS have is incorrect in this case.
Rgds