transfer of property deed at zero cost, how long does it take to get an ownership deed in the new owners name?

big sis, appointed herself mom's caretaker and got a general durable power of attorney(mom had a stroke and it damage the left side of the body, mom is unaware of what is going on around her)which i was told she has the right to do whatever she wants, not what mom needs. mom property deed was transfered to big sis's daughter. mom got no money, and mom does not know. mom been out of her house almost 2 years. there is no deed of new ownership in the daughters name on public record,only on the assessment department computer. does it take that long for a deed to become public record. the orignal deed of mom and dad, dad's death certificate, and paper of the transfer of property are public record. Mom is not able to sign anything, big sis did, but on the paper of the transfer mom's name is typed in. is the legal.