My Summary Overlays are bad after upgrading to 4.7
The issue appears to have been caused by some sql that was posted as a solution to a different problem, here https://civicrm.stackexchange.com/a/18547/233. 

If you also ran the bad sql, you can fix it by running the sql command:

update civicrm_uf_group set name = 'summary_overlay' where name LIKE 'summary_overlay_%';


Specifically, the bug arises because that overlay is generated from a snippet with what should be the summary_overlay profile, but because the name was altered, the overlay is using all available profiles.