Order of Sims in Portrait Panel Switched in Sims 4

Sometime after bringing my sims home from a vacation at the national park the order of my sims in the portrait panel switched.  I only have two sims, a wife and husband.  Originally they were in that order in the portrait panel (wife, husband) but now have flipped.  They are both the same age (26 days from aging up to Adult) and the only thing that has changed is that the wife is now pregnant.  Anyone have any idea why they flipped or how to get them to change back?