Adding the numbers, since they settle part of this. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.
One thing that is still open after traveltech_sara’s answer:
How would you tell the difference between that and the alternative explanation?
lucas_SP_BR said:Practical: whatever you change, write down the date and the reason.
I read this differently from lucas_SP_BR, on substance rather than tone. Pushing back on the consensus forming here. Consistency is not the same as correctness, and a board that agrees with itself quickly is usually agreeing with the first person who sounded certain.
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Shop Reference Standardslucas_SP_BR said:Practical: whatever you change, write down the date and the reason.
Correct as far as it goes. The part it does not cover is what to do when the honest answer is "not enough data", which is more often than anyone likes.
OP back with an update, since a thread like this is useless without one.
Reporting back with a partial result, because a partial result is still better than silence. Two of the three things suggested helped; I cannot separate them and I am not going to pretend otherwise.