The first photo shows two planes, one that has waited for a gate to be open, and another that just came in when a gate was open.
The second photo shows that first aircraft, that was waiting, not change to a yellow highlight when a gate was open.
The third is the exact same, except that this plane arrived after that same gate was opened, yet, it came up in yellow.
Was the example in the second photo intentional? If not, how is it meant to be used?