shakarav, in the beginning I would drift (or just go away) and then when I became conscious of the meditation I would not know where in the circuit I should be. I used my analytic mind, like you, and understood the om and mwa locations, as well as the little variations. However, eventually I just began to trust myself to start when I felt I should be. Sure enough, but I usually end right on schedule. If I don't, well then I figure I needed a little more work on those sites.
You are perfection.
Iam2
