Yippy, Inc. (YIPI)

[BigBake1]

You are correct they do not trade after hours, however transactions that occur during the trading day are often reported after market close. The most common causes here in the OTC are in fact trades that didn't make it in time and settlement transactions known as Weighted Average Transactions. A good read with links is here:

http://investorshub.advfn.com/boards/read_msg.aspx?message_id=90995860