I found my DD's A times went up & down a bit at this stage too..increase during the developmental leap, then we're shorter again between leaps
Sounds like you are observing her, listening to her and adapting to meet her needs. It's all you can do & it's fine & normal to change A times up & down as she need you too
The inconsistency is frustrating, I know, but you're doing a great job
Xxx