Runes are confusing

It says that:

Marks are Offensive, Seals are Defensive, and Glyphs are Magical.

This is true but also misleading, because people(like me) might think marks offer the best AD/AS/ARP as well as AP/MPen/Cdr runes, and think that Seals have the best Physical Defense, and Glyphs have the best Magical Defense.

I think there should be more clarity int he Rune category description.

E.g.

Marks: Physical Offense Seals: Physical Defense Glyphs: Magical Offense and Defense

Its sad how long it took me to realize this on my own.