Ah, that says a lot. If your going to trust your tune changes to what your scanner tells you can be a mistake.
I quit using Atap 5 years ago when I saw too many things wrong. Fuel learn is a EPA PID since they dictate when trim values are averaged in or are ignored and you need to know what PCM has either commanded injectors off or went to min pulse width.
It is an important PID to know when engine is going into decel or is in decel or when PCM is truely into power enrichment mode