I'm the owner of VOIPo and saw this.
Could you PM or e-mail your ticket numbers for the 10/23 update to tim @ voipo.com so I can take a look.
The response you got from our support sounds odd and I'd like to look into it and see if we can't get it resolved for you.
If one of your numbers works well and the other doesn't, something seems wrong there.
Please send me info so I can take a look and see what we can do about this. I'm not 100% sure that response from support is accurate without looking into it.