Candled pattern in only egg?

[herpchick]

Hey guys! So I've got my last clutch of the year, 4 eggs from het clown x het clown. They're on day 36 and doing great! I'm a little bit confused though, I candled them on Tuesday and saw some pattern in one of the eggs but not the other 3. I figured they just needed a couple more days or they're pushing away from the sides....... whatever. Today I checked on them again and candled them, same thing. Now it's a very distinct pattern in the one egg and I'm 99.999% certain it's a 66% poss. het but the other 3 eggs still have absolutely no pattern anywhere!! I'm starting to get nervous here, has anyone else had this other than with albinos? I'm really, REALLY hoping my het clowns aren't actually het albinos...... so looking forward to clowns
Thanks all!
Kristin