assets list error?

[Yonsef86]

One of my lines (just 2 stops A>B>A) has had during one day:

- 876 boarding events
- 40 runs (according to timetable)
- train capacity of 576 pax (just one train running the line)

yet... the assets list shows 9 events of "boarding failed: full train" on this line on this day.

I am pretty sure that 585 pax would not have tried to board this train at the same particular moment leaving 300 passengers to board any of the other 39 runs.

What's going on?