Bukkit

What steps will reproduce the problem?
1. create 2 chests with 2 signs which both have [mailbox] on them
2. right click sign 1 and then right click sign 2
3. now both chests are protected against user interaction except the creators

What is the expected output? What do you see instead?
i would expect the first chest to be unprotected like before

What version of the product are you using?
0.1

Do you have an error log of what happened?
nop

Please provide any additional information below.