I play on PC, and I have about 90 hours of play time down. I even completed to Main Mission. I'm confused about something though. I have 3 Shouts that will not unlock. I have killed quite a few dragons and you know, absorbed their soules but these 3 shouts still will not unlock while I have quite a few now that are unlocked. The count of slain dragons is like 20 or so I believe.

So how do I unlock these shouts? Is there something I need to do, or is it the game glitched?