Hi Bernard,
This was my first attempt at editing OpenStreetMap, so apologies if I did anything wrong and thanks for taking the time in correcting it. I do not recall duplicating or adding any new highways (apart from one, where the marked official path is heavily overgrown and all the locals walk along a field boundary parallel to it until re-joining beyond the overgrown part). Other than that one instance, I thought I had only amended/ corrected the existing ways. There was I think three instances where the footpath and service road were shown separately but incorrectly routed, and which in reality are the same way, so in correcting the routing I moved the nodes together so one ran on top of the other - maybe you are referring to that. For one of these instances I removed the non-existent duplicated path which had been shown running alongside a service road, whereas in reality it actually runs along the road itself for a short distance. 
Anyway, I don't want to appear to be argumentative - I've looked again at the area and I can't even see what you've changed, but it all looks good to me. Thank you.
I see all the ways and nodes history listed below, but I don't really know what they mean or how to view them on the map. Maybe that will come with experience.
Thanks again. 
John