[ZombieBerry]

I had multiple contact photos that kept changing based on what linked accounts one (or more) of the contacts were linked to.

I found most of my problems came from Twitter/FB/LinkedIn

Contacts, look for the people(s) who contact photo keep changing, click on their contact. In the menu bar at the bottom of the screen, should be a Link with a small number next to it (Number of linked accounts connected to the contact)

After clicking on that you will see a list of the linked accounts, I bet one of those will have the photo that keeps being attached to your main contact. Delete it or choose [Unlink]