Ok, thank you. Now I've understood.
I've lost about 12 days of earnings because I've not added my 396 HAT in the stake

Patience!
Anyhow in my opinion Hawala should realize a guide on Youtube for this staking wallet. It will be more clear.
Another question:
if I desire to transfer my 396 hat elswhere (since now they are blocked in my wallet for stake), I need to Click Cancel to remove tokens from stake...right?