Hi guys.
Just to add confusion and panic to this particular topic.
I contacted my local Ducati service centre and the person I spoke to still thought it was two years and that it had only moved (always been 5) for newer bikes. And was kind of disbelieving of my info.
But still very good service from them and they asked me for the link to the service sheet and the pdf if I could. Which I have now sent by email so just waiting on a reply. They are going to contact the factory directly and get back to me.
I wasn’t questioning or doubting anybody’s research from here. It’s more a quandary about why the change has came about; belt part no change as an example. Then it kind of snowballed a wee bit.