
The idea is that many minor things you could do while undertaking a standard action (mostly moving) are classed as being move actions. If you are skillful in combat (+1 base attack bonus) you can combine unsheathing a sword or putting on a shield with a move actions (like moving and buckling on a shield, or getting up and unsheathing a sword). However, they are still intensive enough operations on their own that it counts as a move action if you do nothing else 'move-y'. Hence in a surprise round you can't unsheathe a weapon and attack, though you could move and unsheath a weapon, ready to strike next round.
The idea of the five foot step is just giving a mechanics to the fact that really combat isn't static (hence why each person gets a 5 foot zone around them to call their own usually!) So really when undertaking a standard action, the 'jitter' or a personmoving around can probably get them five feet away from where they were, while they are still concentrating on their task. Obviously, the five foot step is a mechanical fudge, so if a person is deliberately moving somewhere with a move action, they don't also get this fudge.
Long story short - 'no', and 'well spotted'

And yeah, speaking of how the round goes, I think I have an AoO to roll at least!