LM1 wideband reading outside set range

[Semi-retired]

My LM1 is set up for 10-20afr 0-5v and I'm getting readings from 9.2afr-19.8 while cruising on my stock 04 gmc truck cruise and light throttle 19.8afr, 100% throttle shows 9.2-10.5 afr this cannot be right?
I have had the truck for quite some time and tried putting the original tune back in when I saw the odd numbers showing up since I am trying to learn I thought I messed something up, but found exactly what I have described.
I have also tried calibrating several times.

How can the wideband read outside the set range?
What could be causing these readings? calibration?

Thanks any info would help!

[LSxpwrdZ]

The range you set is only the range of the analog output. The display itself will still read the full spectrum. You'll come to find out that the Innovate widebands have very noisy analog 0-5v outputs compared to other widebands.