Sway unsteadily, reel, or totter.
Doubt, waver, be shocked.
Have multiple groups doing the same thing in a uniform fashion, but starting at different, evenly-spaced, times or places (attested from 1856).
Astonished, taken aback.
Arranged in a way that is not uniform.
The U.S. Senate holds staggered elections, with only one third of the seats being filled every two years.