Sounds like you got the lighting under control. For example, I have my blues go on at 9 am and then the whites at 10am. The whites go off at 8pm and then the blues go off at 9pm. I dont run moonlights, but they don't really make a difference.
The nem will move if he is unhappy usually, if he needs more light or flow he will go to where he wants. Since he's in one spot he probably just likes it there.
i would give him a day or two and see how that goes. he could be digesting the last meal you gave him and if the pieces were too big he may be having a problem with it.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.