John
Yes, it can get confusing and that's one reason we ask for photos, plus the context usually gives the needed ID, as in this 2 1/2-year-old post. Common garden pelargoniums are widely referred to as zonal geraniums and that helps also.
This nomenclature is so entrenched I think it's a losing battle to correct it. Like Pothos/Epipremnum, there's no harm in reminding people, but don't expect dramatic change.
