a dodge offset allows you continue a combo after you dodge. you just have to hold the button you hit prior to dodging in order to maintain the combo. so one quick example of a dodge offset would be: P, K(hold), dodge, P. it's kinda hard to explain but that should make sense.
but anyway, on normal, quick weave attacks like PKP and back+forward P or K work well against Jeanne on chapter 2. she doesn't really dodge anything on those difficulties, so you can destroy her in just a few seconds if you hit her with weave after weave.