Bug with multiple Memberships for one contact

There seems to be a problem for contacts that have more than one membership...

Example situation:
A user Barney Rubble has more than 1 membership...

Description of problem:
Go to the individual contact and click on the Membership tab.
Now try to click the more->delete link for the top membership off the list it actually deletes the bottom one in the list. Also, if you inspect the URLs then you see that the membershipID always equals the membership at the bottom of the list.

Another symptom of the problem is multiple Renew links (one for each membership the contact has) appear when clicking the >more link