It is not unheard of to get no wind, and right, and left, all at the same time. Happens more at longer ranges, of course (I am thinking 600 yards). Or just one short gust that only affects the bullet for a short distance.
If you have a short gust that deflects the bullet, the bullet will still keep drifting off course after it passes through the gust. The deflected bullet has effectively been re-aimed in a new direction.
That means that a short gust 25 yards in front of the muzzle does a lot more damage than a short gust 25 yards in front of the target.