There are a couple of reasons why this may have occurred. Firstly, if you are a Premium member, you may have queued up production or construction that was awaiting resources. When your resources arrived, they were immediately used to initiate one of your queues.

Secondly, if you attempt to buy or sell more resources than are currently available in the Market at the price you see, then your resources or money will be held by the market until the offer becomes available again. At this point, the transaction will be automatically processed. We recommend that you check the 'My Offers' section of the market to ensure you do not have any unexpected offers waiting.

Also, keep in mind that a trade with another player will not proceed if either you or your partner does not have the agreed resources to trade.

Finally, ensure that you read all trade offers carefully. It is not uncommon to receive a demand for resources disguised as an offer.