A bug or not

I have 3 kits but when I choose the first one as a home kit and then the second as away, whatever I change, 3rd kit as away or home, the first one is away and I can change it.

You may won't undestand me so I will give you some photos. I need to know that it isn't a bug before do something.

Screenshot by Lightshot
Screenshot by Lightshot
Screenshot by Lightshot

The grey and white cannot be used as home and away because they are the same base color. If one was grey and white and the other white and grey, it would work.

I generally make my jerseys in pairs at the same time to make them opposites.