Not exactly, the transfer probably actually finishes. The uplink terminates all running remaining uploads the moment it has 80 successfully uploaded pieces. But there is of course latency between the uplink detecting this and the cancellation message being received by the remaining nodes. If lots of nodes are fast and likely equally fast, they may all finish at almost the same time and before that cancellation message arrives. The node may then still end up losing the race, even though the entire transfer was completed succesfully.
Basically, if the script shows low numbers (<95%) you are losing more races than average… but if the scores are high… you still might be… we just can’t know for sure. So low = problem, high = who knows…