Hey Vic,
I finally got around to fitting a new injector. Will let you know in the coming weeks if it resolves this "oil level rising" problem.
Also I'm trying to blast my bike as much as I can. I read somewhere that being too gentle when running the bike in can create a glazed bore, leading to a poor piston ring seal.
Don't know if this is true or not but thought it worth a try, as I have done 1800 miles, it can't hurt