If one drives over an area 1000 times, it appears as the whole paddock was worked. Instead the area which was worked may only be a 1x1m spot.
As an example:
This image shows total applied: 0.2 and 81.9% of the field area was applied. The truth is, only ~5% was really worked on, the rest was applied in that one circle.
Who is guilty? I’d blame the driver, why drive in circles. 
Seriously, I believe AOG at least used to have the feature to calculate the true applied area, excluding overlap. Never tried it myself though. However all the commercial screens that I know, do it like in your example. Don’t think it is fair to insist something better from AOG even if it often does things better than the commercial products.
If i do an operation in someone’s field and have to double up in ‘difficult’ areas I would want to know what I’ve done so it’s fine AFAICS.
AOG does have it, i commented it out again as i suspected it was causing some problems - but i will be testing it again as we are starting to seed here soon. It shows the percent region overlapped - but unlike commercial units it doesn’t show the actual area remaining, it shows the area overlapped which means it will work without a boundary as well - something that is not available commercially AFAIK.
Here you can see exactly what you mean, its a 49.8 ha field, 24.75 is applied. while using normal field remaining shows 25.05 left the actual remaining based on overlap is 26.69. 6.62% of the field applied has been overlapped. It also keeps track of how many times up to 3 times it has been overlapped. Also not done commercially where they just subtract total - seemingly applied.