If you do not leave a Will, there would not be a personal representative or anything required. However if one of the beneficiary designations is not made or for some reason there remains any assets without proper beneficiaries, an intestate Estate would have be opened and a Personal Representative would be appointed by the Court.
Under Florida law he would have been required to file a copy of the Will with the County Clerk within ten days. It is likely the property was transferred without a Will and he had some type of ownership interest in it. You can search at the County Clerk website for the deeds and review how the actual transfer took place. My recommendation would be that you contact an Attorney who specializes in Probate Litigation.
If you Will was valid in Maryland it would be valid in Florida. However, every states laws are very different and I would suggest that you consult with an Attorney in FL related to updating your prior Will.
Letters of Administration will need to be certified within sixty days for a bank to honor the document. You also would still need to be actively serving as Personal Representative and not have been discharged through the Court. You can request updated certified documents from your Attorney or the clerk of court.
Typically someone needs to be related by blood if they are located out of the state of Florida, however there are some exceptions that would allow certain non-blood relatives to serve. If your intention is to have a law firm serve as your Personal Representative, we would be happy to discuss what would be involved. Remember you can always change your Will and change who you have serving as Personal Representative.
It would appear from your Question that the Attorney is trying to substitute an informal accounting for a formal accounting. A formal accounting can take more time to prepare, however you are entitled to the same as a beneficiary and should hire an Attorney of your own if you feel your rights are not being represented. It should not delay an estate to prepare the accountant. You can also try to contact the Attorney for the Estate directly and see if they can help clarify what is happening in...