Created attachment 177008 [details]
Photo of "Peoples"

This is a very simple error, the tags for people are reffered to as "Peoples" in the "properties" view. It should just say "People:" then list who is in the photo. Also if it is just one person listed as a tag it still says "Peoples", in theory it should be Person, but I understand why sticking with "People" even in this case makes the program simpler. That said I see no reason it is "Peoples" not "People". 

Also this may be intention if so let me know. But what I can see from a quick google search: 
Most of the time, people is the correct word to choose as a plural for person. Persons is archaic, and it is safe to avoid using it, except in legal writing, which has its own traditional language. Peoples is only necessary when you refer to distinct ethnic groups (for example, within the same region).