sounds like its working as it should - ie. its a landrover, and will never work properly!
1. smash interior light with big hammer
2. ignore dials
3. when it stops leaking, worry!
OOOOOR!
1. its probably some dicky wiring somewhere.. use a multimeter on it and see if its constantly live. if so then go further down the chain and to the same again, its probably just a connection thats touching something somewhere. fix that and it will probably stop!
2. dunno what you could do about it really, other than change the dial or possibly theres a modification for them to correct it?
3. god knows, is it coming out of the chassis or running down it? if its coming OUT of it then it might be the rare model that comes with "blood".
alternatively, it could be a breather thats fed into the chassis rail which happens to be leaking oil out, maybe?