From investopidia16 May 2018 15:30
DEFINITION of 'Cancellation'
A cancellation is a notice made by a broker, to his client, informing him an erroneous trade was made and is being rectified. Despite the fact technology is an ever-present and ever-evolving part of daily life, trading mistakes are made, either by human or electronic error, and brokers must correct the mistake immediately, notifying the client of all errors and actions taken to resolve the mistake. Naturally, all transactions and steps taken are recorded to lay out the cancellation and ensure the broker is not mishandling the account
This is according to imvestopedia, so we know that the mm's are not incompetent! So, as mentioned on Monday,this looks like transfers and also has a dual purpose to keep the share price at this level. Again, could someone be building a stake here?