well lets put it this way, when i type <!-- System:#19:Inventory --> it only shows the user #19's inventory list, so this tag is put in custom layout to have it working, u get it now?
Hmm...Well, the Guild Bank page isn't something that's controlled by the Advanced Layout, and to be honest, it seems to me to be a rather trivial issue.
I can say with honesty that this probably isn't something you can expect to see supported with any kind of haste.
I'm sorry.