Known Aporkalypse Bugs
From Aporkalypse Wiki
Known multiplayer bugs:
Double chests have been rotated 90 degrees with the change from Region to Anvil world format in 2011. Players who haven't been on the server in a long time and discover this should break and rebuild the chests if they don't like the rotated placement. Note that this world change also brought a 90-degree change to the compass directions, so old signposted directions may be erroneous.