RE: Wacky moves...A trade for fewer than 500 shares is an odd-lot trade (when the stock price is under $1.). The seller gets whatever he can, not bound by the bid-ask. The same for a buyer-he might have to pay above the ask to get an odd lot fill. Notice that Yorkton was the broker buying at .44, and also was the broker selling at .55 (the other odd-lot trade today-300 shares). This tells you that Yorkton is the responsible equities specialist (market maker, more or less) for ANGOSS. You can check this out for future trades in lots under 500-all the trades should have Yorkton on one side of the trade or the other. Yorkton will bunch the small lots into full bid lots to match up to bids. Every stock has one broker that handles all the odd lot trades to keep things orderly.
As for the brokerage costs, these are often the remains of larger trades, and the small trade is not charged separately from the initial large trade (for example, an order to sell 5,400 shares at $.50 would see 5000 go at .50, and upon completion of this trade, the 400 would go at whatever Yorkton and the selling broker agree on, presumably less than .50, thereby allowing Yorkton to accumulate shares cheaply to make a small profit upon future sale.
Mike