Totally agree with Andrew. As a wholesaler and rehabber for 11 years, I can tell you that the LAST thing you want to do is push your seller into a corner. They can soil your name on and offline, get the state bulldog (Atty. General) on you and/or a whole host of issues you simply don't want over one deal.
The attorney should have been handled differently EARLY on in the deal if you ask me. It soulds like the attorney has been communicating directly with the seller. If so, that may have been mistake #1. First I always get a consumer-friendly (as opposed to investor-friendly) attorney for my sellers (and buyers, if need be). Someone whose personable and patient.
Second, if the attorney has a lot of requests for my seller, I FIRST see what is it that I can actually do and avoid bothering the seller with. I then take the ones the seller must do on their own and bring them to the seller myself. Every wholesaler should have a well established rapport with their seller. So that when they come to the seller with pain in the butt stuff to do, it comes across better than it would from an impatient attorney or his rushed assistant.
Third, that established rapport also helps you to avoid your deal being circumvented by another investor. Most of my (buy) deals take anywhere from 5-16 months to process and close. During the process I end up needing a lot from sellers. But in the end they are grateful I was patient enough to work with their problem real estate (their words and viewpoint, not mind) and are amazed I will willing to do so much work to get it done. And I get a great deal I couldn't have dreamed of getting on the mls.
So Mike, try going back and reviewing your relationship with the seller and how you handled this deal. The key, imo, is to avoid aggravating the seller. Pay them a fee for working with you (especially in the case of someone with a POA and whose not getting paid). Help them out with other non-real estate related problems they may be having. Something. But taking the legal route and clouding title is usually NOT the answer. Good luck.