on the heat sources jei listing page:
"flint and steel" is listed twice on page 2 one at 6x one at 4x.
torch is listed twice, once on page 1 and once on page 2. Both those heat sources list 2x

Yep. This is a limitation of the Ex Nihilo devs. They don't know how to add an icon for Fire so they made the image flint and steel. I cannot fix this. It's on them to figure out how to show fire properly