Well, perhaps it's only in our time frame. For instance, let's imagine that the electron goes forward from 0 to 5, then bounces back to 1, then to 5 again, and back to 2 etc.

If we were at 1.5, we would see it moving forward TWICE (0=>5 and 1=>5), but only returning ONCE (1<=5; we haven't gotten to observe 2<=5 yet).

Whether it's plausible I have no clue :) it just shows that in principle you can have local asymmetry while everything still balances out at the end.