Poor resolution, out by a factor of ~4.7

[M0LTE]

I'm running v1 firmware as a test, and I'm finding the current value is too large by a factor of about 4.7.

This is with a sensor 100A SCT-013-000

Is this expected? Should I just correct for this in software?

I also find the resolution is poor at the low end of the scale, e.g. I find it very hard to detect say a 40W light bulb. Normal? Anything I can do about it?