Mahabharat Sambhav Parva Section LXVII mentions that the five sons of Draupadi from the Pandavs were actually rebirths of Vishwas.

And, O bull in Bharata's race, they who became the five sons of Draupadi, those bulls amongst the Bharata princes, were the celestials known as the Viswas. Their names were Pritivindhya, Sutasoma, Srutakirti, Satanika, Nakula, and Srutasena, endued with mighty energy.

I want to know if these Vishwas are the same as the Vishwedevas? Also since Draupadi had five sons (one with each Pandava), why are there 6 of these celestials mentioned?