In eeschema of kicad 4.0.x symbol names must be unique over all libs. Otherwise you must take care of library priority.
More details see: Any conflict with names of modules and libraries?
This will be solved in kicad 5.x
In eeschema of kicad 4.0.x symbol names must be unique over all libs. Otherwise you must take care of library priority.
More details see: Any conflict with names of modules and libraries?
This will be solved in kicad 5.x