As published on this link I have added key via batch file and registry add command.
however, underlying system is window 2008 r2 core 64 bit and key was added to wow6432 section. Backups never did became incremental until I manually added key to original location mentioned in the article.
My question is how does registry redirection influence this key added. if I'm about to deploy this key via batch file it will be redirected to 64 bit section of the registry which didn't produce expected outcome.