Hi. Dong lo
1.Please check security did you give a create delete access for role or not and check module role assign to app user roles, last any micro flow apply on buttons give access to that micro flow.
2.you placed grid2 on list view both are same entity that's why, it will shows twice you can use either grid 2 or list view, it will not shows duplicate data
I hope it will help you,
Thank you!