Brees 33rd ranked player? Dynasty or not, these ranking are not good. I see a lot of issues. In my opinion.
Keep in mind rankings on FBG are done as a consensus but you might examine each persons rankings and opt to go with that individuals rankings versus the consensus. Personally I care more about Dynasty rankings not so much that they help me decide who to draft but to help me get gauge trade value of players I either have or want to have so I kind of like looking at it from the POV of the consensus.
Dynasty rankings tend to differ a great amount from person to person more than re-draft rankings so I try not to focus to much on the random player that seems way out of place in an individuals rankings but instead try and look at the overall rankings. For instance someone mentioned PFF. I like their site and find their rankings to be fairly credible but for instance they've got Reggie Bush listed as RB50 in a PPR format and that's just insane and if I focused on that I'd never visit their website again but their overall rankings seem fairly solid.
One question I had on FBG dynasty rankings and that is are they assumed to be PPR or non-PPR?