Fenix 5X - Pool Swim app faulty?

Hi all, just got upgraded to 5X! Hope anyone can share if they have similar issue with the default pool swim app not able to customize? I am able to customize in watch setting, but when I go back to the app, it will always show the default layouts? I have tried removing/re-order/rebooting..etc and none of them worked? I am on software 6.00 and is this the first reporting issue? thanks all and merry xmas!