Spells: NPC DoTs remain after cure

[Rais]

Was fighting a Illis Shaman in Seb, me 57 Monk.

I had Turgur's Insects on me. Druid was doing doing Cure Disease/level 5 (oops). After a few tries the icon went away. I was still attacking as if the slow was still on me.

After about 5 mins, I could finally attack at normal speed.

As far on this server, cure disease has always cured slow. So I thought it was just strange for icon to go away, and still be slowed.

I had Visions of Grandeur,Storm Str, Hero/Symbol of Marzin, Major Sheilding, Grim Aura, Group Resist Magic, Levy as buffs.