Pb the order was placed at 4:04 Sydney time and removed at 4:06...

Pb the order was placed at 4:04 Sydney time and removed at 4:06 Sydney time according to confirmation emails.
At the time the order was placed there were buyers at .35 and one seller at .355
I placed the order and then checked the depth immediately and there where 2 new buys at .355 and .365 instantly.
When I removed my sell I did the same and both of those buys disappeared instantly.
I am only guessing that they were computer generated as they appeared instantly and disappeared instantly and were almost equal volume to my sell order.