User is assigned to wrong membership level


We have a problem with one of the user accounts on our site. The site use the Membership plugin to restrict content on the site.

The user have payed for subscription trough PayPal (See screenshot), but is assigned to the wrong membership level. I've tried to change the membership level manualy, but it's not possible. The expire date should be one month ahead, but the expire date for this user is 2015-05-31. See screenshots.