I thought we already finished the voting...
No, according to wdleehi the first voting was basically an evaluation to see what people were thinking at that time, and was meant to give people an opportunity to fill any holes before final voting.
This is the "official" voting. From what I understand (this is wdleehi's and IP's deal), we're doing this vote to determine division winners, then we'll be doing another vote (for each conference) to determine the 8 playoff participants, and their seeds.