Because it's not 50% off before the 65% promo code, BOGO 50% is not 50% it's 25%
#FakeNews
(1. The title doesn't say 50% off + 65% off it says 50% and 65% off promotions.
2. If it was 65% off and 25% off the math doesn't add up. A $40 item comes out to $10.50. If it was 65% and then 25% it would be $13.50, but in fact it's $10.50.
3. This is one of the mos complex posts I've ever worked on, as can be seen by the confusing nature of this promotion, calling it 65% and 25% off would be even more mathematically incorrect than saying 65% off and 50% off. )