@gregoryvaugahan I moved your post over to the Other Devices space.
On Roku devices, you can adjust the way your music collection is sorted by opening the Pandora app* and pressing the up arrow on your remote until you reach the menu at the top of the screen. Click the icon (initial or picture) in the top right corner of the page, and then Settings and then Content Settings.
Here you'll see the option to sort your stations by Recent or Sort A-Z.
If you still do not see the option to sort alphabetically, please send us a picture of what you're seeing.
*To ensure you open the main Pandora app (and not our voice-enabled lightweight app), open Pandora from the menu of your Roku, not via voice command.