"What if I was running my heater and fridge?
Could that explain it?"
A charger supplies any loads first, then the battery gets any amps left over.
If you had a steady constant 7 amp load the whole time, not like a furnace cycling, then the monitor would show 53 instead of 60 amps constant
A Trimetric monitor ( I thought this was true of all monitors) only records amps in and out of the battery. So if the charger is supplying 53 amps and your furnace comes on at 7 amps then the monitor would drop to show 46 amps. The AH count would reflect the lower amps for that time.
I don't have any info on your monitor. I could not find one in Kisea's line of products so no user manual.
I note that the first set of numbers where you seemed to do a 30-70 came out to 68AH so that came out right. This time you did a 1-100 and showed an amazing 133AH. What was different this time? That would mean the monitor thinks you have a 133AH battery to show 100% SOC with 133 on the clock.
EDIT---"for example if my soc% reading is 75% soc I know my amp hour reading will be 75ah.
If my soc% reading is 25% soc then I know my amp hour reading will be 25ah."
No you don't. :( You are(were I hope!) assuming that your battery is 100AH and that there is no heat loss while recharging, or that the monitor's charging efficiency allowance is just right.
Now you see it says 100 and the AH count was 133---
This whole business where Li guys seem to not understand the basic question, "Percentage of what?" is a mystery. Some kind of mental block?