Bukkit

What steps will reproduce the problem?
1. Have Emeralds set as currency
2. download http://dev.bukkit.org/bukkit-plugins/global-market/
3. set up a priced item and try to buy it. it will either give you +1 emeralds or emerald count will stay the same

What is the expected output? What do you see instead?
Supposed to subtract the cost from the emeralds, instead it adds +1 or stays the same

What version of the product are you using?
latest

Do you have an error log of what happened?
no errors

Please provide any additional information below.