I think the cloaker skills are actually:
Disquise: 6 ranks, +2 cha = 8
Fly: 6 ranks, +3 dex, +3 class, -2 size = 10
Know (religion): 6 ranks, +2 int, +3 class = 11
Perception: 6 ranks, +2 wis, +3 class, +3 skill focus = 14
Sense Motive: 6 ranks, +2 wis = 8
Stealth: 6 ranks, +3 dex, +3 class, -4 size (large) = 8
So they do add up just fine.
Hope this helps,
Mead