iPod touch iPod touch does not mute?

[TorontoLRT]

Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

My iPod touch plays sound even when the volume is at zero. It was formerly jailbroken, but no longer is. Any ideas?
EDIT: turning off my ringer seemed to fix it. It seems all sounds were being counted as rings. Are iPod touches even supposed to have ringer settings?!

 

[alust2013]

A lot of sounds are classified as ringers, especially with apps for some reason. I find that pretty annoying myself.

 

[Brucewl]

Ringer setting, just like E-mail, app notice and alarm.