Confusion about aggregation results

I am a bit confused by the result I am seeing from ‘min’ or ‘min_over_time’

For example I have metric ‘up’ for the status of an exporter target.


The result is '0'

This is expected, the target is down.

Next is where it goes wrong…


the result is '1'

I also tried


but this also comes back as '1'

Where is it getting ‘1’ from, especially as a minimum?