Jack - Did you adjust your HSD ride height by the lower spring perch or by the lower mounting bracket?
The lower mounting bracket(bit that bolts to the wheels) should be used, if you fiddled with the lower spring perch then this could be your issue as you've messed with the preload and spring travel (and also probably have the locking ring loose).
Teins are adjusted via the lower spring perch but others like HSDs/BCs and many others aren't.
This should help you: