Were they doing that in March, when the incident in question happened?

Sites that were not getting enough people coming in to use all the doses they had available were doing that in my area. It was not all sites all the time but at a certain point, lots of places switched priority to getting doses to people regardless of demographic so that they didn't spoil. And lots of that info was word of mouth or social media posts, because there was little way to centrally coordinate it.