I would let the neck settle after making
truss rod adjustments before having a cow over a twisted neck.
Chances are it will spring back into place, being it sat for so long...unplayed. Plus, climate changes have a great deal to do with the neck moving around.
Let it set over night, tuned to pitch, and check it again in the morning. Do another adjustment, and let it set over night again.
You'll find that necks this thin will be quirkey. Don't panic...it should adjust out.
J>