MOPN is unsolicited which means market makers are not allowed to keep inventory and only allowed to represent present orders, not that they dont break the rules, but that is the rule for unsolicited stocks... MOPN needs to file the necessary paperwork to become solicited, than mm's can keep an inventory and help to represent the stock...
also T trades are not after hour trades but rather a settlement from trades throughout the day. for example , a mm has a large client's order that they are buying or selling throughout the day at different prices- the t trade is the avg price for the amount of shares they cleared throughout the day...
that at least is my understanding of these matters.
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