On the Furvilla tumblr page when you search "Tiger Eye Peak" One post comes up. When you search "Tigereye Peak" nine posts come up with that spelling. I also haven't really seen any examples of "Tiger Eye Peak" being in the actual game. (If it does appear somewhere let me know). I think whenever it's spelled "Tiger Eye Peak" it's just a simple mistake. But the best course of actions would be to ask them on twitter, otherwise this will probably never be settled. :P