it was the last minute RADIO change that made Dua not #1, even if the sales were removed
it really is common sense that rule change should be announced before tracking/computation, not during.
nicki minaj sold more albums yet still not #1
because billboard counted more albums that were bundles with TOUR WITHOUT TICKETS and NOT REDEEMED,
they did it to BRITNEY too
these LAST MINUTE CHANGES really is unprofessional