Hello Osokin,
Yes what you are experiencing is perfectly normal. Depending upon your thoughts, your purpose, your state, your environment, the time at which you are listening, rest assured each Paraliminal listening session will be different than the other even if you are listening to the same CD each time. This is actually the beauty of the Paraliminals.
In you case it is very evident that you have never tried listening to it in the wee hours of morning. Consequently you didn't have any thoughts about how your day went, running in your mind. As a result you were able to immerse yourself deeply in the experience. Further this time your purpose, I guess, was to go back to sleep. And if I am not mistaken you have never listened to the Paraliminal with the same purpose before.
I hope what I am saying makes sense to you. Anyways, inspired by your experience, I will myself try listening to the Paraliminal sometime during the early morning.
God bless you.
Kind regards
Vaibhav Sharma