Each of the 25 scored indicators maps its score input onto −10 to +10 with the rating table copied from your sheet. Values between two thresholds are interpolated and rounded; the ends cap at ±10.
Where your sheet holds a score for a period, that score is used as is. The page reproduces your MATRIX total of 119 for the July 2022 log exactly.
Group totals: leading (4 indicators, ±40), coincident (13, ±130), injections and withdrawals (8, ±80). "Actual growth" sums industrial production, GDP, current account, housing starts and retail sales; "actual inflation" sums the six price measures.
The monthly reconstruction only counts a print once it would have been published (one month after the period for most series, three for the current account and debt ratio), which is why it lines up with your logged scores from mid-2021 on.