My thoughts on this…
A) Person A standing shoulder to shoulder with Person B, causing variances in perspective and light.
B) Person X is taking photos of RBG as she is moving. Person X steps slightly left or right, as RBG is moving, causing perspective/light change. Person X shares photos with A and B (one each).
C) Person X is someone portraying Persons A and B online.
(stoned, started babbling, sry)