Abstraction

I cast abstraction, and fully consumed the flesh. So I was able to eat/drink/sleep/armorlivingflesh hurt me/ect.. but when it wore off, many of those things remained. For instance, I can still sleep, drowning hurts me, and a few others. I don't think its by design. If it helps I was sleeping when abstraction wore off the first time, perhaps that caused the problem? Any answers would be appreciated. Thanks, Fris