How must I understand the definition "all interval lengths are rounded to closest minute" - what is "interval length"??
interval between interesting events or from beginnig of quest or something else...?

Can somebody explain me why monster was killed in "0000:03:04" ?

0000:00:43    Agent J started quest 2 using car pq123bu.
0000:02:41    Car pq123bu was broken.
0000:03:04    Agent J killed monster cockroach.
0000:05:26    Agent J finished quest 2.

If I rounded only output time I get wrong killing time "0000:03:03", but if I rounded all time intervals I get incorrect final time "0000:05:27".
Where is correct rounding?