The result kept the soon-to-be-dethroned champions in third place, four points above Valencia with two rounds remaining.
David Barral opened the scoring for Levante in the 32nd, only for Siqueira to level three minutes later before Kalu Uche put the hosts back ahead in the 63rd.Torres came on with half an hour to play and headed in Jorge "Koke" Resurreccion's corner kick with Atletico struggling in attack.
The final two rounds are in doubt after the Spanish federation announced it was suspending all matches from next Saturday in protest at a proposed law regulating the sale of broadcasting rights.
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