don't get jumpy. use common sense. this thread is for educational purpose.
i've not been doing dyno there for quite sometimes. perhaps they've improved? i do not know and i don't have any desire to check out myself. Anyway, my point is, everybody should do homework and have thorough check before committing to any monetary related activities. Customer are paying for it, so, it's their right to know everything that they've paid for.
and you're correct, the sensors are for AFR.