Have people been accidentally evolving their Pokemon? I hatched a 10km egg and believed that a Flareon came out of it. I looked up the rewards and apparently only unevolved Eevees come from them.
I know that I did not manually evolve it, but the Evolve button could have been somehow touched while in my pocket. Before it hatched I had about 19 Eevee Candies. I did notice that I was at 15 candies.
Since it takes 25 to evolve Eevee, that means the hatching gave me 21 candies. It has very good stats for my level (which is only 11). It has 873 CP, and knows Ember + Fire Blast. Apparently a few of my Pokemon, including the Flareon, from the top rows were powered up with Stardust while the phone was in my pocket. That hasn't happened before.
I'm still not sure if the game is actually glitchy or if the egg rewards were changed.