Recently Joined Teams not displayed correctly

If you look at my home page, https://edge.launchpad.net/~jjesse you see under Latest Memberships teams that I have joined a long time ago, not truely the "latest memberships." I think the problem comes from the difference between joining a team and having been added to a team.

Example: I was added to the Ubuntu cloaked people on freenode on 2007-11-23 but Kubuntu members a team I joined on 2006-04-13 is listed in one of most recent on the front page.
Another example would be the Ubuntu-Michigan team I was added to (both of these teams were by my request) but it is not listed as most recent joined.

Let me know if you need screenshots or I didn't assign it to the correct project. This is a bug on both edge and regular

Thanks for making such a great product,

Jonathan