This is normal because the XUI Views b4xlib depends on xCustomListView.
So, if you use the XUI Views library and you need xCustomListView then you don't need to check xCustomListView library.
Anyway, if you check, there will be no problem because they point to the same libary.
Content of the XUI Views b4xlibs manifest.txt file.
Version=2.24
B4J.DependsOn=jBitmapCreator, jXUI, jDateUtils, JavaObject, xCustomListView, B4XFormatter
B4A.DependsOn=BitmapCreator, XUI, DateUtils, xCustomListView, IME, JavaObject, B4XFormatter
B4i.DependsOn=iBitmapCreator, iXUI, iDateUtils, xCustomListView, B4XFormatter