Wrong Activity creation when Membership status is changed from membership form.

Steps to reproduce-

1) Create membership for a Contact.
2) Click on Edit link - At the bottom where the contributions are listed, click edit on the membership contribution
3) Change contribution status to cancelled and save. (Contribution and Membership status are cancelled). So far so good.
4) Click save on membership Edit page.

Notice that an Activity (Status changed from Cancelled to New) gets created and the Membership status is also changed to New.