Garp, you are right. The lamb RJ had a layer of orange fat in the container when cold. I should have removed it before heating. I also felt that the bhuna / RJ was oily (see below. probably my own fault). Oil doesn't bother me and the meal was delicious.
I didn't actually measure the oil into the pan but simply squirted some out of my sauce bottle and I think I was a bit heavy handed on the butter ghee. After the Base Gravy went in I used the chef spoon to remove probably 1 1/2 TBSP of oil as it reduced. I put this back into the Base Gravy pot.
My recent research into Rogah Josh has shown that even the basic Indian version (Mrs Singh), while having some tomato, is not really a tomato based curry. The Kashmiri versions contain no tomato. Many restaurant's advertise RJ as tomato based and I have prepared recipes with a heavy tomato component. Also RJ is sometimes cooked as a 2 part dish, in BIR anyway, so I guess that's where Syed is coming from with this one. To be honest there isn't a huge difference between the 2 dishes from the same pan, but that doesn't stop them from being really good.