The why can be missed sometimes, it depends on priorities at the time. Most whys can be worked out afterwards, again if there is time, or purely from the stats.
Thanks - that's a rather more succinct (and comprehensible) explanation than this one from the report:
"Although it appears from these figures that there were a significant number of days during the proactive test period when the TEAM* freedoms were not used proactively, it may be that landing A380s, small aircraft or T4 arrivals out of alternation on these days has been captured under the reactive TEAM* totals. When the reactive trigger conditions are also met, it is not always possible to say under which variant of the freedom an aircraft was landed."