It sounds like at least some of your information is coming from the mortgage lender. You should be reluctant to rely on their statements alone. Instead, you should consult with an attorney to check the property records and clear up the confusion.
In Georgia, you can bring an action against your lender after the foreclosure sale. In my practice, we bring claims of wrongful foreclosure against lenders on a regular basis as a result of problems in the notice (and these result in settlement and/or reinstatement of the mortgage). You might be surprised how often the lenders make a mistake in the notice (as it sounds like might have happened in your case)
I would recommend that you have a Georgia lawyer review the notice and public...
In my experience, challenges to problems in the Note or Assignment are not successful. These are perfectly legitimate arguments, but there are a large number of bad decisions on these issues which can persuade an an unfamiliar judge to rule incorrectly. However, if Ms. Soleinjoiner is willing to sign an affidavit confirming that she did not sign or authorize her signature on that Note, then you may have a case (depending upon the dates on which all of this occurred). You may have other...
I see this situation on a pretty regular basis. Often times the lender only realizes the mistake after the foreclosure sale. You need to let a foreclosure attorney review your documents and discuss the facts in more detail to tell you whether you might have a case.
If you signed a contract, it sounds like they will have to honor it. You very well may have a case against the management company, or at least enough of an argument to make them give you something. I represent residents of multi-unit housing in similar situations and often management companies completely ignore the terms of the leases until we get involved. You really need to talk to an attorney and let them review the terms of the lease or contract you signed at the beginning of the month.
There are alternatives to simply letting go of the property, but they will depend upon your lender. In GA, if the lender forecloses on the property, they can still pursue you for the difference between the urgent market value and the amount left on the loan. We are seeing lenders pursue borrowers for this more aggressively in recent years, so you should speak with a foreclosure attorney about which option is best.
It depends upon how your loan was sold, transferred, etc., after TB&W went under. I have several clients whose loans were handled by TB&W and each loan was handled differently after they closed. There is no way to tell you whether you might have a case without reviewing all of the information and documentation regarding your particular mortgage. You need to have a foreclosure defense attorney review these and tell you whether you might have a claim or grounds to stop the foreclosure sale.
You may have a claim against your lender. I have had similar cases where the lender was in the process of approving a short sale but did not tell the borrower that it was denied until after the foreclosure sale had occurred. Though the bank sought to dismiss these claims, the court allowed them to proceed under the theory that the lender had not acted in good faith in foreclosing on the property. We sued the lender and were able to obtain a settlement for the borrowers in both of those cases....
It is highly unlikely that correcting the legal description will entirely remove the equity loan charge-off from your credit report (because it will still likely reflect that you defaulted on the equity loan regardless of which property was described in the deed(s)). However, you probably want to discuss the details of the equity loan and legal description problems with a foreclosure attorney to confirm whether you might be able to correct your credit report.
You will want to present the property records leading up to the foreclosure. When you say the 1099A "shows a different lender" that could give you grounds to challenge the eviction, but not necessarily. You will want to speak with a lawyer about the details to know whether you have an eviction defense.