some duping going on ?

[tvl]

Hello,
a level 20 is running a guild on my realm and the guild bank has 999.964g in the bank and the total worth of the items in the bank is over a few M! (few spectral tigers in it and 14 tabards of lightbringer)

so my question was if there has been a duping method the last time ?
i dont ask an how-to but i'm curious if there is/was one or not.

if someone wants ss of the gb , tell me

[badmdog]

i think its from a couple of months ago there was a dupe method, en people stacked mounts..