Explain what these money bags are, and I could most likely tell you what the dupe is and how to fix it.
If theres a tutorial for adding them, Then post it here.
I strongly recommend rewriting this completely, Server-Side at least.
It seems to have been done very sloppy and rushed.
Problems I see with it are it doesn't check the players current inventory wealth, I.E a player could by accident, withdraw more than he can carry.
I'm guessing its this tutorial I found, so go into your commands and replace it with this:
I will now look at the rest.Code:Nevermind.
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I'd much rather rewrite it, If you wish for me to send me a PM.