I'm getting pretty confused about Hidden Abilities. A while ago, I caught a male Mawile from the Dream World and traded it over from White to Black 2. After finishing, the Dropped Item side quest, I traded Yancy for her female Mawile. I put them both in the daycare and I got two eggs- a male and a female. I checked their stats and only the female one had Sheer Force. Can anyone help me understand whats going on here?