MM Sterling switch acting oddly..?

Starting from bridge and working towards neck…

Position 1 sounds great…!
Position 2 sounds almost exactly the same, maybe just a touch bigger and warmer but not much different from 1
Position 3 sounds very warm with top end rolled off and much, much quieter…?

From what I understand position 3 (the series position) should be the one that shoots the dangly bits off a charging rhino at 50 paces…?

Any ideas..?

Thanks, Bob