Area spells hitting outside targeted area

I keep casting area spells and they often seem to hit allies that are close to the selected area but not visually inside of it. Specifically I have been using Fan of Flames as a kineticist. I always make sure the selection circles of my allies aren’t highlighted, but just now I nuked Seelah and Camellia even though they were only adjacent to the affected area and their circles were definitely NOT highlighted like the rest of the creatures in the AoE.