Every neck I've ever had trouble adjusting (not counting broken truss rods) has had the same problem - it wouldn't relieve. Tightening things up to reduce relief has always worked. Not that they can't fail the other way, I just haven't seen it. So, actually, that's an argument to relax the thing. But, I stil wouldn't worry about it.
Although, really, what's the big deal? Relaxing it certainly won't hurt anything. A quarter to half-turn counter-clockwise, and the deed is done. You're almost certainly going to have to adjust it either way once re-installed, so it's not like leaving it the way it is will save any setup time.