Record overwritten in Additional action infotype 0302

Hi,

I have done the config in T529A and checked U0000 and U0302 for all actions.

Now when I am creating actions on the same day, for some actions new record is being created in 0302,

and for some actions, old record is being overwritten in 0302.

I am not sure why, which config i need to understand because ideally if both U0000 and U0302 are checked then new entry has to be created in IT0302.

Please help me understand this logic.

Regards,

Manu