It took eight years for a woman to be moved out of the room where she was repeatedly raped by a disability support worker.
Some - but not all - of the people sexually abused by a number of Yooralla employees have received personal apologies, years after the crimes.
Some - but not all - have been paid compensation.
At the disability royal commission on Thursday, Yooralla again publicly apologised for the abuse of people in its care.
CEO Sherene Devanesen said personal apologies were made "recently" by the Victorian disability services provider.
"(It was) before the announcement of the royal commission but after the events, long after the events and after the perpetrators were sentenced," she told the Melbourne hearing.
But during further questioning, Dr Devanesen revealed some survivors had not received personal apologies.
And only those who have taken Yooralla to court have received compensation, through confidential settlements.
All four of the people raped or sexually assaulted by disability care worker Vinod Johnny Kumar still live in group homes run by Yooralla.
All four had severe levels of physical or intellectual impairment and were "trapped within their own bodies", noted the judge who in 2013 jailed Kumar for 18 years.
Only one, a woman given the pseudonym Jacqueline, was paid compensation.
The royal commission was told Kumar's other victims had not received any compensation because they did not take legal action, nor were they supported to seek independent advice about their rights.
"And as a result, you paid money, presumably a substantial amount of money, to one survivor and nothing to the others," commissioner Roslyn Atkinson told Dr Devanesen.
Dr Devanesen confirmed that was the case, before later agreeing Yooralla would consider compensating other survivors.
Dr Devanesen said Jacqueline, at her request, moved to a different room after her group home was refurbished this year - eight years after the rapes.
She had no explanation for why no one, for eight years, asked Jacqueline if she wanted to get out of the room where she was raped.
Other Yooralla victims have received compensation, including a woman with an intellectual disability who was sexually abused by a supervisor for at least a year.
Her mother sued for psychiatric injuries and received a significantly greater sum than the survivor, whose case was dealt with as a workers' compensation claim because she worked at the day service facility.
Senior counsel assisting the commission Kate Eastman SC asked: "What part of being raped on the Yooralla premises could possibly be described as a workplace injury?"
Dr Devanesen said the decisions on how the claim was handled were made by lawyers and insurers at the time.
Dr Devanesen said Yooralla had taken steps to better protect the people in its care and deeply regretted the abuse, acknowledging the pain and trauma continued to affect the survivors, their families and carers.
"We're grateful to those who exposed the abuse and we're very sorry for the events that took place," she said.
More recent matters reported by Yooralla to the police included an employee placing duct tape over a person's mouth. The employee was sacked
Australian Associated Press