Yes, it really is simple:
IF Jehovah directs the GB, and the GB get things wrong, then does that mean that Jehovah was having a bad day when he told them those things? Was he feeling unwell when he gave them that "truth"?
OR
Does it simply mean that Jehovah DELIBERATLY gives 'false truth'?
OR
Does it mean that there is NO direction of the GB from an almighty Jehovah at all?