As I suspected the four bolts were not installed at the time of the Alaska Airlines incident, based on this article. From what I had read and watched it seemed

As I suspected the four bolts were not installed at the time of the Alaska Airlines incident, based on this article. From what I had read and watched it seemed impossible for the door to slide upwards if any of the four bolts were installed. And if installed correctly with a castellated nut and cotter pin, seems highly unlikely the bolt could fall out, let alone four bolts. The NTSB stated that the door did slide upward and also stated they could not find the bolts and were unsure if the bolts were there at all.