Always On Time display [HOUR_1_12_Z]:[MIN_Z]:[SEC_Z]

In the Always on display on the right screen you see the [MIN_Z] display as [SEC_Z]

I couldn’t duplicate this.
Be sure you have the Normal hidden when it is AOD mode you might just be showing the normal clock instead of the AOD clock
show-Hide layer

BTW You should not display seconds in your Always On Display it is possible but it is against the Wear OS UI guidelines as excessive battery wear.