Luis,

Your delete and replace only need to execute once, but they are inside the scan which might suggest they get executed again for every row in mytemp. However, they only fire once because the record pointer is carried to EOF() by the Replace command, meaning the scatter/gather only gets done for the first row. In effect you're duplicating row 1 in teste and then updating some records in mytemp that has no effect on teste.

If the goal is to manipulate values and then add them to teste- then you could try

Select * From teste Into Cursor myTemp Readwrite where conta !="318"
*Delete For Conta = '318'
Replace Conta With '225111' For Conta = '321'
insert into teste select * from mytemp

If you want to update the existing rows in teste- then

Select teste
Delete For Conta = '318'
Replace Conta With '225111' For Conta = '321'