How does system perform invoice cancellation ?

Hi,

Please help us on the below issue.

1 - We have an invoice number 6080 and its GL date is 31-May-2018.

2 - It has an effective payment on 07-Jun-2018.

3 - We void this payment .

4 - Then cancel the invoice.

5 - The Periods May-18 and Jun-18 are open periods.

6 - We surprised that the system cancel the invoice on 07-Jun-2018 as screen shot below.

We have a suppose that the system cancels the invoice in its period and if the invoice period is closed, the system cancels the invoice in the nearest open period, according to this suppose the system must cancels invoice in period May-18 not in Jun-18.