This board clearly was not happy conforming to the path the fence-maker intended. So it went its own way.
Depending on how particular the fence owners are, it may not last in that role very long.
As someone works for you, it’s good to recognize their natural bends. Both you and they will be happier as a result. If you, as their boss, can let that co-worker’s bends work for you, you will both succeed. The same exact principle applies to parenting. But in both cases, it’s an art to find those bends.