Problems with build in ue 4

hello friends (sry for my bad english)
i have some problems with build in ue4
1.when i put a point light top of my model and I put very high light intensity for it and then build it and i see low light intensity:
i make this before build:

then after build:

2.after i build my map i see this errors:

what can i do?
3.after build i move my point light but yet i see light from Previous Location:
look there isn t any point light but there is Light emission

please help me

To get rid of those errors you have to create a 2nd uv channel with non overlapping uvs.