Shipping concrete slabs (SnowRunner)

Guys, tell me, please, when loaded into flatbed truck concrete slabs(or cargo platform scouts), indication of download shows 2из2 loading places, respectively, the task was to bring the 2 concrete slabs, but in delivery and try to unload them, indication of the discharge shows the presence I have only 1 concrete slab... In the screenshots below, had to take another flight one plate.
Was such at whom?
p.s. nothing beat delivered accurately.