this is not a server related problem, should go to https://bugs.mojang.com/projects/MCPE/issues/
probably because leads can be unattached from fenceposts and the code is not checking if it's really there... or something else
This happens when a player or mob is in any vehicle and in view. When you turn around and the player/mob is not in view, hand is normal, turn back and hand imitates mob/player.
name it "Dinnerbone" or "Grum" both work, I've heard it's an "easter egg".
Yup, what Bob Joe Eisenhower said, oh and both fences, regular and nether brick
From more world options. When it's open it shows as if they are not on.
I think he means this: http://youtu.be/25w3I2S5Buc?t=9m3s
you can see if the server is listening to the port by typing netstat -ano in a separate command prompt at the server...
for example you can see my server is listening to UDP ports: