Why does RentalStarter show up at the top of the Market page when it has less volume than G.ASICMINER-PT and AMC?

    Asset    Last Trade    Buy    Sell    24Hr Vol.    24Hr Low    24Hr High    48Hr Vol.    48Hr Low    48Hr High
   RentalStarter   ฿0.01100000   ฿0.01100000   ฿0.01012000   27,753 (฿305.2830)   ฿0.01100000   ฿0.01100000   53,677 (฿590.4470)   ฿0.01100000   ฿0.01100000
   G.ASICMINER-PT   ฿3.45000000   ฿3.45000000   ฿3.41900000   190 (฿637.5559310)   ฿3.25002000   ฿3.45000000   291 (฿975.8741610)   ฿3.25002000   ฿3.45000000
   AMC   ฿0.00111000   ฿0.00132100   ฿0.00111000   454,783 (฿591.63108219)   ฿0.00050000   ฿0.00218500   773,005 (฿1274.28178530)   ฿0.00050000   ฿0.00250000