I've been browsing landscape photos. I keep coming across photos that have only one plant tagged at the top, but when I look at the photo, it will have the normal boxes for 3 or more plants. Here is one example:

When you create a box you can either link it to a plant or just type whatever you want into the field. With that photo only one of them were linked to the database, all the rest were just the name of the plant in the box.

Thank you, Jon! That makes sense.

That also happens when you misspell them, as two of them were. I added all the tags.