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Twelve personal bests, and you rated it challenging. Eight exercises in forty minutes, which is a properly efficient session.
Reps went up across the sets.
You went up mid-session, 40 to 50 kg, and held it for two sets. This is the strongest single number anywhere in your history.
The reps dropped away by the last set, so 10 kg was your honest limit that day. That is exactly what the rep rule is for.
Warm-up set, then three full ones.
Second time on this machine in a week.
Your first loaded core work. Two weeks earlier than anyone had written down.
Fifty kilos on the leg press. You worked up to it inside the session rather than waiting to be told, which is exactly the instinct the twelve-rep rule is meant to build.
You also rated this one challenging, and finished all eight exercises anyway.