facing issues with procedural material

so far i had success using slope as factor to determine material, now when i try to use height, i succeded once , but as soon as i put 2nd height , the material preview shows it right but i cant preview it in my material layer in paint options of landscape, its still successful in using one slope though… check the attachments please to understand more… ask if u need some more detail!

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More over my working file capture.

2nd issue is when ever i try to paint over my porcedural material in this level, the material vanishes. XD

and if i want to create a procedural between sand and vegatation post existing wet sand and sand in a height parameter, is this the right way?

Found the fix, had to convert all textures to wrap. thats all.