Yeah it looks quite weird, if you're not using any kind of graphic mod. There seem to be a mismatch between the 2nd and the 3rd kit. It' worth raising this issue into the bug tracker thread, but I doubt it will be fixed for FM23.
Or you could try to
1) Clear you cache - go to "preferences" from the FM drop down menu from the game. Select "Interface" and then click on "reset" on the bottom left of the window. Finally click on "clear cache".
2) Verify your FM files via Steam: open your Steam library, right click on Football Manager 23, click on "properties", from the window just opened click on "Installed files" on the left and finally select "Verify game files integrity" (I'm translating on-fly as english is not my mother language).