Does a successor agent of a durable POA have the right to file a unlawful detainer summons original agent is still actin

Question

My aunt is trying to have me evicted from my grandmother's property against her wishes. She forged her name as the plaintiff on the summons but filled out the details in her own name. That's what I wrote in my answer. However we had a hearing where my aunt gave the judge a paper I did not see the paper. He told me she had POA. And that unless I get an attorney or over turn the POA that he would probably be rulling for me to move out on our next court date. I looked up the POA on the clerk of court website and notice she's only a successor agent and from what I gather online she only can act if the original agent cannot fulfill the duties for whatever reason. True or does she have any rights to do so as a successor. It's against my grandma's wishes, she has mild Alzheimer's but she is aware now and against it. My aunt is exploiting my grandmother financially she takes her social security and food stamps already and now she wants to sell the property. She has it out for me as well..

Q: Does a successor agent of a durable POA have the right to file a unlawful detainer summons original agent is still actin