The present duration of a kalpa of Brahma is called the Varaha-kalpa or Svetavaraha-kalpa because the incarnation of the Lord as Varaha took place during the creation of Brahma, who was born on the lotus coming out of the abdomen of Visnu. Therefore this Varaha-kalpa is also called Padma-kalpa, and this is testified by acaryas like Jiva Gosvami as well as Visvanatha Cakravarti Thakura in pursuance of the first commentator, Svami Sridhara. So there is no contradiction between the Varaha and the Padma-kalpa of Brahma.