Originally Posted by abyssichate

On live realms non glyphed DRW is up for for 5 seconds (costing 60RP) plus 1s/10RP (Unleashes all available runic power to summon a second rune weapon that fights on its own for 5 sec plus 1 sec per 10 additional runic power, doing the same attacks as the Death Knight but for 50% reduced damage.). You are probably looking at your spellbook where active glyphs are taken into account hence the confusion.