You should know that if you need help, than you should provide some info about your system.
For example which device, resolution, program version, skin, ...
As I can see from screenshots, this is skin problem (or scheme).
And this is not really a problem.
Sky pictures are just some kind of simulation (or even not) for all that's above the ground which should be "real" as much as possible.
We could not expect that sky should look real as it is.