For the suspension arms it can be confusing.
There are people who like the short medium arms or the long arms on the front or rear etc etc. so the owner may have played with different set ups.
It seems wrong to me though, maybe thats why the owner sold it because it drove badly
I do believe its worth completey stripping the car down and rebuilding to the manual. things like the wishbones could mean the driveshafts need checking too you dont want long driveshafts in the short arms!!!! or vice versa!!