I've been practicing the once over shave discussed on another thread. I enjoy it as it takes a bit of time off in the mornings.

When I'm done, I can't feel any whiskers except when I rub against the grain on the underneath of the chin. I basically get a very smooth feeling which is perfect for work.

What I'm noticing though is that even with a clean to the touch face, I immediately have the appearance of a shadow where the most dense populations of whiskers are (namely upper lip and chin).

Is this a common thing or am I missing something that I should be doing?