Is this in California? The reason I as is that PC 100 is a very obscure charge and that section of the Penal Code does not have subsections (e.g., (a), (b), (c), etc.) To generally answer your question, charges that are "lesser included" may be added during trial.
The judge should have no power to do that. We have state attorneys in Florida not the DA. Only the state can increase the charges, but these might have been lesser included offenses for which you could possibly be found guilty under the facts adduced at trial.
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