Depositing item quickly into chests for donators was changed from SHIFT+RIGHT click, to SHIFT+LEFT click, this is so that donators can easily place blocks on top of chests again.
More about Automatic Item sorting http://piratemc.com/guides/automatic-item-sorting/
To get these perks you will need to be a donator.
Playing around with /back settings, back in like June or july I added a cooldown and a warmup to back, but only 1 worked at a time with the current plugin im using to add cooldowns and warm ups, So I switched from a warmup to a cooldown until I can do both, Cooldowns set at 60 seconds, but /back is instant (For now!) as it wont allow me to have both.