If you are seeing a+b banks you are looking at the +drive. Each trig acts as a bank in the +drive. Assuming you loaded the sounds anywhere, you should be able to double tap track, hit trig 3 (bank C) and see sounds. To make sure you are in the +drive or the pool, double tap track and then hit left to open a menu that says “browse +drive/pool, filter, etc”.

Also: Functiin + Sound and then go to manager and you should now be able to browse through the banks via trig with exta options by hitting “right” for moving, deleting, etc.