The first occurred in 2010 and involved the dead man's son. Luke McMurtrie's vertebrae was crushed after a tree branch fell on him while he was working.
The other was a near miss in similar circumstances, a month before the death of David McMurtrie.
Mr Cranney questioned why these incidents weren't more thoroughly looked into and why nothing had been done to prevent them happening again.
Mr Cranney pointed out that the employer was required to provide an observer, according to WorkSafe, when there was high stacking. He then asked repeatedly why David McMurtrie did not have an observer.
Mr Merriman replied David McMurtrie was an experienced worker who would have asked for an observer if he thought he needed one.
"His son suffered crushed vertebrae, there was a near miss a month before and then he is killed." Mr Cranney said. "And you say it's his fault because he didn't organise an observer, which is the job of the employer?"
Mr Merriman replied: "Should he have required it, he would have asked."
The inquest continues this afternoon.