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That is definitely not correct.
We use Tracker but moved away from the auto calculations – our analysts do them manually.
I suspect it is a computer rounding issue and someone has applied the wrong rule. For 4SC you would report to 3 decimal places.
In some circumstances, e.g. control limit assessment, you would report to 2 decimal places. When we developed our tracker air system with Start we decided it would become to complicated electronically to set up various rules so the computer could calculate it all for us – we favoured the analyst to manually calculate.