Ok. Update! I went to my LBS and asked them to install my cog on their hubs.

1. Formula hub - Went it with a little force by hand.
2. Dura ace hub - Got stuck in the middle (Same issue with my hub).

So now I'm really confuse. I'm forcing the damn thing by hand right now and still won't go in. I don't have a 1/8 whip right now so this install will have to wait