Hi there thanks for that, yes had the same problem, I find it very difficult dealing with Ibanez, especially in the UK.
My tech guy seems to think that it is 2 way, but I am sceptical there is a loose spot in the centre but when you go lefty loosey or righty tighty it starts to produce pressure but then comes to a grinding halt both ways. This would to me suggest that it is bent.
I have 4 Martins all with 2 way truss rods and they behave differently to the Ibanez. They are nice and smooth both ways.