The image of the routes on that page definitely shows Raftel as that last island where the routes converge, tho. I'm sure we can reason it away as just a general representation, and "Crocus didn't say it," but still.
That really is all it is, a general representation, much like the map we saw recently of the 4 points that actually lead to Raftel, I don't think we are meant to take that as a concrete piece of info. Once the story got going it was very easy to question why no one had sailed there yet. If only one crew had made it there in all of known history there must have been some trick to it. White Beard's flash back with Roger should be a contradiction as well if all anyone had to do was follow the logs. I think even as far back as high school when I first saw that scene I questioned if following the log was all there was to it, especially with how mysterious it was all presented.
Well, Whitebeard probably did find out on his own eventually. I'd imagine he just wouldn't have wanted a handout. Plus Roger could have just flat out told him how to get there, versus informing him of the Red Poneglyphs.
Man, you'd really think more people would be gunning for Luffy's crew because of Robin. Just a little inconsistency there after this revelation. :P
I guess I'm the One Piece defense force today but even here there has been nothing inconsistent with Robin and the things surrounding her at all. I've read this on a few forums and I feel like people aren't considering everything we've seen up to this point.
1 - Robin's entire life she was running from people because of what she knew.
2 - One major player, Crocodile, recruited her specifically for that reason.
3 - We had another massive arc with a major branch of the government focused on capturing her because of the same ability.
4 - Caesar had Kinemon captured for Kaidou because of his potential ability to read the glyphs.
5 - Doflamingo didn't need Robin by the time he met the entire crew, he was already after much easier prey in Momonosuke and had Kanjuro imprisoned.
6 - Not every enemy they've come across seems to be aware of what the Poneglyphs mean in finding One Piece. The actual allies they've made who were secretly in charge of protecting the Poneglyphs even had no idea what they were for.
The Emperors will certainly be more active in trying to capture her now because well the Straw Hats are at their door step and not half a world away. Other crews however, after taking out Enies Lobby publicly like that, you better be big shot yourself if you wanted to go after the Straw Hats.