Thanks.
What do we make of this language:
If an off-side call is delayed, the Linesman shall drop his arm to nullify the off-side violation and allow play to continue if:
(i) All players of the offending team clear the zone at the same instant (skate contact with the blue line) permitting the attacking players to re-enter the attacking zone
IOW, why didn't Olofsson have to tag up?