Ok, if they are leaks:
1) Where are they coming from?
2) What benefit would it be of whoever it is to leak them?
I doubt that anyone still affiliated with the club would leak it knowing the pandora's box it might open.
It's likely a disgruntled ex-employee who already had a copy or had the ability to access a copy as revenge - or - the leak is on ASADA side. Or even scarier, News Limited may be intercepting emails again...
If it's an ex-employee it would be unlikely to be anyone who had a long term affiliation to the club as loyalty is still a code of honour in club land.
Regardless, the Sharks made their first mistake by hiring an ex-ASADA official to conduct the independent review.
It is in effect akin to a defendent hiring a former employee of their current prosecutor. Some might say that she should be professional enough to bring a genuine unbiased approach to any investigation but there will always be a loyalty to the organisation that she helped foster and believed in.