Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
There was not much in the way of entertainment at Crow's Perch, so the baron's men were always looking for new ways to pass the time. One of their favorites - horse racing at night and the chance for friendly (and not-so-friendly) betting that went along with it. Though the witcher had plenty of other things to occupy his time, he decided he could spare a few moments to take part in these races.
