I have been noticing the same with my orders, even I don't use AON. But also I have notice that I only get a part of the displayed last sale, so if the last sale is 100.000 I get filled 78.000 or something like that. I had an order at .0153 that got filled in 5 chunks and the chunks did not coincide with the last sale size numbers at all.
it's annoying to look at them play the fool with the price. i feel like not looking at neom for a year. it was on such a great uptrend with nice consolidation. now the mm's are just fooling around.