Here's an update:

My numbers ported over the weekend. Something about the change apparently reverted some of the conditioning back to the default. All was reworked and everything is again working perfectly. Even with multiple devices behind a router.

I have to say I am very very impressed with the diligence of the voipo support team in resolving a problem. You guys are top-shelf, and first-rate.

I'm proud to be a voipo customer.