when i play the natural harmonic on the 7th fret on the lowest string the sounds vibrates, like an out of string does when you tune with harmonix, this is quite worrying,
i play very low i tune to drop b and a flat regularly and i play with thin strings, what is wrong with my guitar? whenever i play chords etc it sounds a little off, and no mater how hard i try to tune the vibration out, it still remains

im quite concerned

your input would be greatly appreciated
dont use thin strings with such a low tuning look into .11 or .12 gauge, if useing thicker strings doesnt get ride of the vibration it might be your action
highly unlikely to be warped, proably just really slack strings though without seeing your guitar i cant say for sure, look down he neck and if its not twisted your alrite