Bukkit

What steps will reproduce the problem?
1. Setup a chest group with two chests creating a double chest.
2. Set one of the two chests making a double chest as main
3. Use sync command to sync chest group

What is the expected output? What do you see instead?
Expected: First 1/2 of inventory should copy to single chests and all of double chest should copy to double chests.

Result: Main chest duplicates inventory to all chests, including other half of double chest inventory

What version of the product are you using?

v0.5

Do you have an error log of what happened?

No error log, coding bug.