Nothing was changed on the title to the house it was still in my aunts name at the time of the sale.
See an attorney. It is unlikely you had the power to keep the estate open this long. I am uncertain as to if you could even sell the property as fiduciary at this time without getting your letters reissued. You should have been filing fiduciary tax returns for all the years the house was earning income and I suspect you were not because you would have received repeated contact from the IRS demanding an answer why the estate was kept open for such a long time. The representations on your disclosure were most likely of the type an executor would make (As if you had no direct knowledge of the facts.) when, from the amount of time you controlled the property, a warranty deed would have been appropriate.
I don't want to scare you as all this may just be nothing and everyone is going to go away happy, but, you almost assuredly placed yourself at risk from any of a number of people. I would be interested in how you will report the capital gain on a property held for 20 years in an estate that really should not be open in any event. See an attorney. I suspect he will advise you not to seek any compensation for your acts for any of a number of reasons. Frankly, a lot of this does not make sense to me and I suspect we are, at least a bit, talking past one another. But, take all the paperwork, including probate documents to an attorney for him to review and advise you. Maybe it's nothing and all you're out is a couple hundred dollars for the consultation. Or, maybe it's something and early representation will help you from a lot in damages and hassle down the line.
Attorney, attorney, attorney.