While helping someone troubleshoot a problem with their group, I added a photo to an existing album (set to Group Access) using my member account. When I went to edit the photo, it shows the Owner drop down list. For testing, I changed it to someone else and Updated, then couldn't get ownership back. The owner had to fix it. As a further test, I created a Personal Access album and the same thing happens, the Owner list is there. I thought the Owner box/list was only supposed to be visible to group owner/mods.
As a side effect, some of the email addresses were visible since those people never set a Display Name.
Duane