trading in abc last thursday afternoon

I had spoken to asic about the share movement in abc learning during the close of trading last thursday and they had inform me that the 2 million shares sold on the match out was a mistake made by an institution pressing the wrong button ,instead of buying 2 million they had sold 2 million and had to buy them back on tuesday.they also told me they are still looking into the issue to see if the institution befitted from the situation.anyone seeking further information on this issue should contact asic on 1300 300279