Elizabeth, Let me just take a minutes to tell you how sorry I am for this absolutely shocking situation, it is one of the worst real estate stories I have heard. It is truly shocking, I just can't even believe it.
They have the metes and bounds, but the title reports in my area are always accompanied by a plat map, highlighting the tax lot being insured. They do this because no one can read and interpret a metes and bounds description. Did you get a copy of the plat map showing the tax lot being insured? Also, were the property taxes on the prelim the same as the property taxes on the listing? Was the insured Seller Fannie Mae on the preliminary title report? Was the the street number physically posted on the home somewhere when it was for sale?
In my area, listings are identified by street address, then further described with a legal address within the listing. A legal address generally looks something like 36N4WCC Tax Lot #400. Was a specific tax lot listed through the MLS? Further, the size of the parcel is also indicated, and my guess is, it was NOT listed as 0.03 of an acre lot offered for sale.
The current title company can blame the title company from 2004 all they want, but your grievance is with the current title company because they offered YOU clear title. If the title company has to pay out, they can then file a claim against the previous title company if they like. You have no reason to involve yourself in their fight.
You have so many things going for you in this case. The biggest item is that you get to sue two parties with extraordinarily deep pockets. The Title Company, and Fannie Mae! Pardon my excitement, but if this story involved only broke people, it would be financially devastating for you. In I believe this is a punitive situation because of the time and money you spent on the home.
So many things on your side in this situation that I can see. 1. the mls listing i presume had photos of the house, and the house data, along with photos of the home you purchased. 2. your sales contract had the street address of the home. 3. You cannot be expected to interpret metes and bounds description, that is the title companies job. 4. You bought a home in good faith. 5. You improved the home in good faith. 6. You hired a professional to assist you in a safe purchase. 7. You purchased title insurance.
I don't blame the listing agent at all, because they are actually not allowed to research a property they list UNLESS they are representing the Buyer. It is really up to the Buyer, and the Buyer's Agent to perform due diligence regarding an REO purchase.
Lastly, is the driveway the only access to the son's house, or does he have access another way?
I want to say, that the series of events that took place that created this problem is so unbelievable, it is not typical in the most complicated of REO purchases.