There is also the fact that when pondering the sentence the judge takes into account the motive for commiting the crimes as well as the behavior during the period, which is the reason why Emma's dad was so important as a character witness in Sophia's behalf. Commiting a crime out of sadism is a lot moreserious that commiting exactly the same crime for economic reasons or in a fit of anger, also commiting a crime with a person under probation and knowingly encouraging, aiding and covering crimes that break the conditions of the probation is never seen in a good light by the DA or the judge, in particular since as a Ward part of the responsabilities are to report crimes, even off-duty, not commiting them herself.
And another thing that a judge will take into account when grating probation is that the crimes were commited as a Ward, so she wasn't able to take the commitment as the honor and responsability that it represents and in fact she abused the rights and privileges of her office to act with greater impunity. So it might be that the judge put Emma under probation, but he at the same time might revoke her participation in the Wards program since she has shown herself uncapable of being part of law enforcement and unworthy of the other benefits that come with the program. In fact it would be fun to male an omake like that, its an interesting twist to see Emma come every week to the PRT HQ to give an urine sample and adjust her tracking monitor while the rest of the Wards gossip behind her back and Piggot rages at the lost of manpower.