Over in the Verizon forum, people had posted when they received a new PRL from Verizon. When I had a CDMA TracFone, the PRL it received, was always in the same range as the other PRL numbers posted to the Verizon forum, so it sounds like you should have a 52xxx PRL instead.
The 59xxx could actually be something else, could it be the ERI version perhaps (extended roaming indicator)?
As far as better roaming coverage, that phone actually roamed on Sprint in my home area, just once. I was inside a supermarket and when the phone lost the Verizon signal, it picked up Sprint. Shortly after that, with the next PRL update, it did not contain the local Sprint SID.
T-Mobile customer since 2005. If T-Mobile acquires Sprint, I just might go back to postpaid...