Contact the attorney that handled your DUI. He/She will be able to better advise you. They may be able to get the Probation Officer to waive your PV for the petty theft. If your PO sticks to the rules or has had a bad day then you may be staring down a probation violation. That means you will likely have do do some jail time, if not the whole sentence, at least part of it.

When the judge tells you to keep your nose clean and you get the slighest smudge then it's not clean.