Hi all,I have noticed when i set a derated climb thrust of example CLB-1, when i pass a certain altitude the climb thrust setting switches to CLB.I suppose this is normal behaviour, as it happens not always. I think it depends on wheight and combination of height.It happend with me at FL150 with TO weight of 315 T (700 lbs).Just to confirm if this is normal behaviour or ... ?

Yes, as the air thins it means the thrust decreases naturally and there's no need for derate.