You can do it both ways like you've mentioned above. If you leave FUA=0, you may end up with the issue again. But you can "assist" the auto-leaning by manually entering a value and it'll auto-learn from you.
'15 IS350 F-sport Ultra White/Rioja Red
'09 E90 M3 7-DCT Interlagos Blue/Novillo Silver
[MS Pullies|K&N drop-in|Test Pipes |Evolve Stage II tune|Evolve Servotronic Map|Evolve M3 GTS-DCT file]