You have two changes at once here. You cannot attribute anything until one of them moves.

Photograph everything before you open it. Ten seconds, settles most disputes.

Written confirmation email after every phone call. Cheapest insurance there is.

No wrong answers, and yours is a good one.

Test one thing at a time. It feels slower and it is the only way to learn anything.

Test one thing at a time. It feels slower and it is the only way to learn anything.