I test at 0600. Feeding happens multiple times through the day, usually 10am-6pm.Yes you can see in the thread that many users posted after the updates that things were better. Mine is still nowhere near as close as yours, but it’s close enough that I’m comfortable using it for a trend line. I still check with Hanna a couple times a week to ensure I know the actual value.
What time are you testing and how long between feeding is your test going?