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Normal blending for landscape

Hey guys, i been working on this landscape shader for a couple days and so far im pretty happy with how its coming along.
and just now i tried to blend in my normal maps oh god did it mess things up lol so after a couple of different tries i figured i would come in and ask for some advice

this is what happens when i add the normal blending in
ce1dcd9f22681621880c3858f7923a278dff33c6.jpeg

and here is the section for the beach layer
09a8ff4d6d60e6c505563ca86909808beb970de8.jpeg

i have tried changing the weights on the blend node… no matter if i use height alpha or weight blend and no matter what preview weight i give it i just get boxes for where i paint beach