Talk about canceling clearly erroneous trades.
Yesterday morning, I was told by an NYSE spokesman that the exchange didn't keep historical records of trading errors and busted trades. People at the CBOE and the Nasdaq said that they weren't sure if records existed or not but they'd get back to me if they did. They didn't get back to me.
Six hours later, the NYSE decided to cancel its earlier statement. The NYSE now says that it definitely does have the data on erroneous trades in its markets. That data, however, is not public.
So, assuming that the NYSE is providing accurate information now (as opposed to yesterday morning), the SEC has data about erroneous trading but just doesn't share it. Glad we got that straightened out.