IOS – way to control ringer volume with siri

You can prevent Siri from cutting you off in the command mode by holding down the Home button until you're done speaking.

Normally you activate Siri in the command mode by holding the Home button until Siri responds, then releasing the button and talking. In that mode she'll cut you off pretty quickly. Continuing to hold the Home button bypasses that limitation.

No, there's nothing wrong with your phone.

Yes, Apple messed up.

Ever wonder why you have to have an Internet connection to use Siri? All the voice-to-text transcribing is done on Apple's servers - and those servers tell your phone exactly what to display and what to say.

So, you should probably tell Apple about it - post something on their support forums, file a Radar, something. Most likely, it can be fixed server-side.