@ajqjjj These two transaction IDs show who bought your shares: 1065058349027251382 and 13637478378761040243. Your burstcoins would have been sent directly to your wallet at the same time as you saw these two transaction IDs appear. Like @Gadrah_ said, the profits from a sell order get sent to your wallet without a unique transaction ID showing that particular amount, because your order is already listed from when you first created it (I think). For instance, should you sell only half of the shares you placed in an order, and then cancel the rest of the order, you will only see the initial order placement Tx ID and a Tx ID showing that you cancelled the remaining shares.
On rare occasions, I think a sell or transfer of assets can get "undone" if you were on a fork, and when you catch up to the right chain again, your transactions will reappear as if you never touched then. At least this can happen with transfers, not sure about the asset exchange.