LOL...that is because they are crossing market centers. If you look at the order before that one.
63800 @ .0017 then 8200 @ .0017 total 72000 shares.
when an order can not be filled completely at one market center they then cross. This is where you see the smaller orders coming from. Look at a BB terminal and you will see the market centers these orders are being processed at and by which market maker.
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