How do I know for sure if the family trust is ended? Do I take the word of the other beneficiary's?

I would like to believe my sister's, but I came across some gaperword that recorded in the Official Records of my county. An affidavit was filed for Incompetence. At that time my father was not incompetent, he was just old (90) and needed help with his affairs. It stated in the trust that there has to be (2) phycians letters submitted, by (2) different phycians, not by only (1) that supposebly signed both letters. The attorney said that the letter was recorded as an error, and that he would enter an amendment to take care of this, eventhough it was recorded June, 2006. He ped away April, 2007. Can this be changed or could my sister be liable for the action that she's taken. How long does it take to put the house in all (4) of are names, when the trust ending took place 8-14-07 Where would I look for an amendment to the Deed of Trust, in the Grantor/Grantee index where it originally took place. Looking foward to hearing from you. Thank you TF