I have never been to your part of the world, but in looking at the Charlotte county profile it appears your system has been rebanded. Rebanding is for mitigating interference from Sprint cell phone towers, as well and other system improvements.
You have to make a few changes. When a system like yours is rebanded, your scanner requires the entry of a special band plan in order to track the system correctly. I don't think this can be done from the front keypad.
I have a 396T and 996T and use USAD, and I like it. USAD is the programming software that Uniden provided when I got my scanner. USAD does not allow custom band plans that are required for rebanding. So I went with a program called Freescan. Freescan will let you enter the new "bandplan" required for your system.
Rebanding - The RadioReference Wiki
Software Support for Uniden Rebanding - The RadioReference Wiki
How often do you program your scanner?
Do you have a computer?
What type of software do you use to program your scanner?
Do you still have the programming cable?
I hope this gets you started on your journey.
Jim in Pittsburgh