So the difference is that there were two fines issued for the same offence - one for 61K and one for 20K. The specific offence was that there was collusion bet

So the difference is that there were two fines issued for the same offence - one for 61K and one for 20K. The specific offence was that there was collusion between BeLeave and Vote Leave which ultimately meant that money spent by BeLeave was actually supporting Vote Leave's campaign, which was not lawful. Both 'parties' were fined - Vote Leave and BeLeave/Darren Grimes. The judge who overturned Grimes's fine did not pass judgement on whether the spending was lawful or not. The appeal was upheld based on the ruling that the Electoral Commission had not properly done their homework to prove BeLeave's legal status, or justify the maximum fine permissible for Grimes - essentially a procedural error, rather than a factual error.