In some screen displays Kat's name length means that her name takes up two lines. As the name headers are top aligned rather than baseline, the extra height falls at the bottom of the name. Because of this, the photos begin at different heights, which isn't as visible when the screen size is wider, but when minimised is obvious as sits closer to Joe's photo, it might be more visually appealing to have the extra line height at the top so the photos are at equal height.
In some screen displays Kat's name length means that her name takes up two lines. As the name headers are top aligned rather than baseline, the extra height falls at the bottom of the name. Because of this, the photos begin at different heights, which isn't as visible when the screen size is wider, but when minimised is obvious as sits closer to Joe's photo, it might be more visually appealing to have the extra line height at the top so the photos are at equal height.