If he confronts you about moving forward with another agent, be polite and be honest.

It's not confrontational yet gets the point across.

Maybe your tenant doesn't want to sign, but is non confrontational and therefore avoiding you. 

So I confronted her, and she gave me some sob story about losing her phone.

Until he received a bill of $500.00He confronted the Plumber and said "That's $500/an hour.

I am an occupant incidentally and I am perplexed I may confront future quandary when I move in or out.

Here's how you do it: http://www.lavote.net/home/records/death-records/viewing-vital-recordsIf you find that there was a death, you'll probably want to get a copy of the death record to confront the seller and/or agent.

I confronted my tenants about the neighbors complaints and they refuted them and showed video evidence  denying some of her claims and then showed videos raising issues against her.

I would calmly confront the agent and explain that commission he is asking for is on the current sale, he earned commission on the purchase when you bought the house. 

Either way, her confusion is not with you, but with the incorrect info she has posted.All that said, I think it is important to seek the proper legal advice, as suggested by Alina (great advice) when confronted with this type of senario.