Azzy
ᚳᚣᚾᛖᚹᚢᛚᚠ (He/Him)
I don't think it's weird. Low-mid-high are the level categories. First to third, fourth to sixth, and seventh to ninth are the spell divisions. Everyone I played with back in the day considered third level to be the highest of the low level spells. Also, if you look at the title names, it wasn't until 9th-11th level that you got your last name level title. Magic users got theirs at 11th level.
Yeah, but in my mind, that simply makes 5th-level really the onset of mid-level with 9th and getting to high level. Anything beyond 14th was just unlikely to happen in my experience.