I have noticed this happen a couple of times, where the News section announces the hiring of a coach which not only didn't happen, but also makes no sense considering the timeline of the world. This announcement showed up in Tark in the evening of the first exhibition game. As you can see here, this team does not have a coach.

My first thought is that this is a coach who took this team in another world, which is accidently showing up in Tark?

i believe it means they reserved the team happens when a coach returns to a world or reserves a D3 team

With how frequently coaches return to the game, and how infrequently I see this situation occur, I have a hard time believing it generates that news story every time a coach returns.

thats usually when it happens, it also disappears after a few days so if you don't notice it right away when they sign then you don't know they reserved the job.