I suggest you speak with the trustee and/or personal representative of the estate to get the answers to these questions. You, as POA and acting on her behalf, are also entitled to see any accountings from the trust and from the estate.
Please note: The above is for general information purposes only. It is not intended to establish and does not establish any attorney-client relationship.
I agree with the previous attorney. If there's still an issue with getting access to the records, you should contact a Probate/Trust attorney to discuss further options/remedies that may be available to you.
The information provided should be considered an opinion only. This information does not establish a client-attorney relationship. Until the facts of your case are completely evaluated the answer provided could change. You should consider setting up a consultation with an attorney in your area.