@Ethel_A ,

As mentioned if we created credit memo, it will show double credit balance in the same amount of overpayment. 

Then, @RhoiceW advised not to create credit memo so that we can just apply credit on the next invoice. 

Apparently, it will not automatically apply to the next schedule memorized invoice. 

On your post, you mentioned credit memo. How do you create this credit memo without creating double credit?